[PATCHv3 RESEND] mm: page_alloc: fix CMA area initialisation when pageblock > MAX_ORDER

With a kernel configured with ARM64_64K_PAGES && !TRANSPARENT_HUGEPAGE, the following is triggered at early boot: SMP: Total of 8 processors activated. devtmpfs: initialized Unable to handle kernel NULL pointer dereference at virtual address 0008 pgd = fe05 [0008]

[PATCHv3 RESEND] mm: page_alloc: fix CMA area initialisation when pageblock MAX_ORDER

With a kernel configured with ARM64_64K_PAGES !TRANSPARENT_HUGEPAGE, the following is triggered at early boot: SMP: Total of 8 processors activated. devtmpfs: initialized Unable to handle kernel NULL pointer dereference at virtual address 0008 pgd = fe05 [0008]