[openEuler-1.0-LTS] spi: phytium: panic on boot

内核信息：openEuler-1.0-LTS
缺陷归属组件：spi: phytium
缺陷归属的版本：openEuler-1.0-LTS

缺陷简述：
内核版本支持phytiumn-spi后，在支持phytiumn-spi的飞腾D2000机器上，启动时概率性内核崩溃.

硬件信息
飞腾D2000支持spi机器

【问题复现步骤】
使用openEuler-1.0-LTS版本编译内核在飞腾D2000支持spi机器上测试，启动时概率性内核崩溃.

【实际结果】
内核启动失败。
    [   11.612688] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000030
    [   11.621472] Mem abort info:
    [   11.624255]   ESR = 0x96000005
    [   11.627297]   Exception class = DABT (current EL), IL = 32 bits
    [   11.633202]   SET = 0, FnV = 0
    [   11.636243]   EA = 0, S1PTW = 0
    [   11.639371] Data abort info:
    [   11.642238]   ISV = 0, ISS = 0x00000005
    [   11.646060]   CM = 0, WnR = 0
    [   11.649016] user pgtable: 64k pages, 48-bit VAs, pgdp = 0000000042711b01
    [   11.655704] [0000000000000030] pgd=0000000000000000, pud=0000000000000000
    [   11.662480] Internal error: Oops: 96000005 [#1] SMP
    [   11.667344] Modules linked in: spi_phytium_plat(E) spi_phytium(E) sch_fq_codel(E) ip_tables(E) ext4(E) mbcache(E) jbd2(E) sd_mod(E) ahci(E) libahci(E) sdhci_pci(E) cqhci(E) sdhci(E) libata(E) mmc_core(E) phytium_dc_drm(E) dwmac_phytium(E) stmmac_platform(E) rtc_ds1307(E) stmmac(E) i2c_designware_platform(E) i2c_designware_core(E) dm_mirror(E) dm_region_hash(E) dm_log(E) dm_mod(E)
    [   11.700953] Process systemd-udevd (pid: 813, stack limit = 0x00000000805e49d8)
    [   11.708163] CPU: 0 PID: 813 Comm: systemd-udevd Tainted: G            E     4.19.90+ #2
    [   11.716151] Hardware name: PHYTIUM LTD D2000/D2000, BIOS
    [   11.721623] pstate: 00000085 (nzcv daIf -PAN -UAO)
    [   11.726405] pc : phytium_spi_irq+0x24/0x80 [spi_phytium]
    [   11.731707] lr : __handle_irq_event_percpu+0x64/0x228
    [   11.736743] sp : ffff00000800fe60
    [   11.740045] x29: ffff00000800fe60 x28: ffff801fac5e0000
    [   11.745343] x27: ffff000009454000 x26: ffff801fa223f000
    [   11.750641] x25: ffff00000800ff14 x24: ffff000009010028
    [   11.755939] x23: ffff0000093557f0 x22: 000000000000001a
    [   11.761237] x21: 0000000000000000 x20: ffff801fa223f000
    [   11.766534] x19: ffff801fafc31000 x18: 0000000000002280
    [   11.771832] x17: 0000000000000000 x16: 0000000000000000
    [   11.777129] x15: 0000aaabfe88dca0 x14: 0000000000000000
    [   11.782426] x13: 0000aaabfe88dbce x12: 000000007f010000
    [   11.787724] x11: 0000000000000000 x10: 0000000000000040
    [   11.793021] x9 : ffff00000937f3d8 x8 : ffff801fc0002fe8
    [   11.798319] x7 : ffff801fc00030e0 x6 : 00000000000000d0
    [   11.803616] x5 : 00008020b6db0000 x4 : 0000000000000000
    [   11.808914] x3 : ffff801fafc316a8 x2 : 0000000000000030
    [   11.814211] x1 : ffff801fafc31000 x0 : ffff000008180844
    [   11.819509] Call trace:
    [   11.821944]  phytium_spi_irq+0x24/0x80 [spi_phytium]
    [   11.826895]  __handle_irq_event_percpu+0x64/0x228
    [   11.831585]  handle_irq_event_percpu+0x40/0x98
    [   11.836015]  handle_irq_event+0x50/0xe0
    [   11.839838]  handle_fasteoi_irq+0xc8/0x158
    [   11.843922]  generic_handle_irq+0x3c/0x58
    [   11.847917]  __handle_domain_irq+0x68/0xc0
    [   11.852001]  gic_handle_irq+0x78/0x180
    [   11.855736]  el1_irq+0xb8/0x140
    [   11.858868]  copy_page+0x64/0xac
    [   11.862084]  wp_page_copy+0x104/0xc28
    [   11.865733]  do_wp_page+0xd8/0x5c8
    [   11.869123]  __handle_mm_fault+0x538/0x828
    [   11.873206]  handle_mm_fault+0xd8/0x1a0
    [   11.877030]  do_page_fault+0x210/0x4f8
    [   11.880765]  do_mem_abort+0x68/0x118
    [   11.884327]  el0_da+0x24/0x28
    [   11.887283] Code: d503201f f9405e63 f9400c64 9100c082 (b9400042)
    [   11.893368] ---[ end trace 03c7a882b84b4855 ]---

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