clk-baikal: initialize clock early enough, and memory allocation fixes

[asheplyakov]

Currently clk-baikal gets initialized very late (after starting secondary CPUs, PCI-e init, etc).
This is wrong: clock driver should initialized much earlier. Use CLK_OF_DECLARE_DRIVER
to ensure clock gets initialized/registered early enough

dmesg before:

[    1.063892] Asymmetric key parser 'x509' registered
[    1.069345] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 246)
[    1.077756] io scheduler mq-deadline registered
[    1.082848] io scheduler bfq registered
[    1.087526] crc32: CRC_LE_BITS = 64, CRC_BE BITS = 64
[    1.093158] crc32: self tests passed, processed 225944 bytes in 184000 nsec
[    1.100987] crc32c: CRC_LE_BITS = 64
[    1.104969] crc32c: self tests passed, processed 225944 bytes in 29980 nsec
[    1.125936] crc32_combine: 8373 self tests passed
[    1.144367] crc32c_combine: 8373 self tests passed
[    1.152032] gpio-481 (pcie-x8-clock): hogged as output/high
[    1.159813] efifb: probing for efifb
[    1.164093] efifb: No BGRT, not showing boot graphics
[    1.169726] efifb: framebuffer at 0xfb1a6000, using 8100k, total 8100k
[    1.177005] efifb: mode is 1920x1080x32, linelength=7680, pages=1
[    1.183800] efifb: scrolling: redraw
[    1.187781] efifb: Truecolor: size=8:8:8:8, shift=24:16:8:0
[    1.194106] fbcon: Deferring console take-over
[    1.199068] fb0: EFI VGA frame buffer device
[    1.204451] baikal_clk_probe index 0 name <gpio> i 0 
[    1.210133] baikal_clk_probe index 1 name <uart1> i 1 
[    1.215903] baikal_clk_probe index 2 name <uart2> i 2 
[    1.221672] baikal_clk_probe index 3 name <apb> i 3 
[    1.227247] baikal_clk_probe index 4 name <spi> i 4 
[    1.232821] baikal_clk_probe index 5 name <espi> i 5 
[    1.238493] baikal_clk_probe index 6 name <i2c1> i 6 
[    1.244169] baikal_clk_probe index 7 name <i2c2> i 7 
[    1.249842] baikal_clk_probe index 8 name <timer1> i 8 
[    1.255710] baikal_clk_probe index 9 name <timer2> i 9 
[    1.261581] baikal_clk_probe index a name <timer3> i a 
[    1.267445] baikal_clk_probe index b name <timer4> i b 
[    1.273314] baikal_clk_probe index c name <dmac> i c 
[    1.278986] baikal_clk_probe index d name <smbus1> i d 
[    1.284853] baikal_clk_probe index e name <smbus2> i e 
[    1.290719] baikal_clk_probe index f name <hda_sys_clk> i f 
[    1.297069] baikal_clk_probe index 10 name <hda_clk48> i 10 
[    1.303423] baikal_clk_probe index 11 name <mshc_axi> i 11 
[    1.309678] baikal_clk_probe index 12 name <mshc_ahb> i 12 
[    1.315932] baikal_clk_probe index 13 name <mshc_tx_x2> i 13 
[    1.322380] baikal_clk_probe index 14 name <mshc_b> i 14 
[    1.328431] baikal_clk_probe index 15 name <mshc_tm> i 15 
[    1.334593] baikal_clk_probe index 16 name <mshc_cqetm> i 16 
[    1.341043] baikal_clk_probe index 17 name <hwa_clu> i 17 
[    1.347201] baikal_clk_probe index 18 name <hwa_clu_hf> i 18 
[    1.353651] baikal_clk_probe index 19 name <hwa_axi> i 19 

dmesg with patch:

[    0.000000] NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0
[    0.000000] GICv3: GIC: Using split EOI/Deactivate mode
[    0.000000] GICv3: 768 SPIs implemented
[    0.000000] GICv3: 0 Extended SPIs implemented
[    0.000000] GICv3: Distributor has no Range Selector support
[    0.000000] Root IRQ handler: gic_handle_irq
[    0.000000] GICv3: 16 PPIs implemented
[    0.000000] GICv3: CPU0: found redistributor 0 region 0:0x000000002d100000
[    0.000000] ITS [mem 0x2d020000-0x2d03ffff]
[    0.000000] ITS@0x000000002d020000: allocated 262144 Devices @880200000 (flat, esz 8, psz 64K, shr 0)
[    0.000000] ITS: using cache flushing for cmd queue
[    0.000000] GICv3: using LPI property table @0x0000000880170000
[    0.000000] GIC: using cache flushing for LPI property table
[    0.000000] GICv3: CPU0: using allocated LPI pending table @0x0000000880180000
[    0.000000] random: get_random_bytes called from start_kernel+0x7dc/0x9d0 with crng_init=0
[    0.000000] baikal_clk_probe index 0 name <gpio> i 0 
[    0.000000] baikal_clk_probe index 1 name <uart1> i 1 
[    0.000000] baikal_clk_probe index 2 name <uart2> i 2 
[    0.000000] baikal_clk_probe index 3 name <apb> i 3 
[    0.000000] baikal_clk_probe index 4 name <spi> i 4 
[    0.000000] baikal_clk_probe index 5 name <espi> i 5 
[    0.000000] baikal_clk_probe index 6 name <i2c1> i 6 
[    0.000000] baikal_clk_probe index 7 name <i2c2> i 7 
[    0.000000] baikal_clk_probe index 8 name <timer1> i 8 
[    0.000000] baikal_clk_probe index 9 name <timer2> i 9 
[    0.000000] baikal_clk_probe index a name <timer3> i a 
[    0.000000] baikal_clk_probe index b name <timer4> i b 
[    0.000000] baikal_clk_probe index c name <dmac> i c 
[    0.000000] baikal_clk_probe index d name <smbus1> i d 
[    0.000000] baikal_clk_probe index e name <smbus2> i e