ARM: fixup section mismatch warning for alloc_init_pud()

This patch fixup below warning

WARNING: arch/arm/mm/built-in.o(.text+0x2320):
Section mismatch in reference from the function alloc_init_pud() to the function .init.text:alloc_init_section()
The function alloc_init_pud() references
the function __init alloc_init_section().
This is often because alloc_init_pud lacks a __init annotation or the annotation of alloc_init_section is wrong.

---
 arch/arm/mm/mmu.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

index 94c5a0c..95a8098 100644
@@ -616,7 +616,7 @@ static void __init alloc_init_section(pud_t *pud, unsigned long addr,
 	}
 }
 
-static void alloc_init_pud(pgd_t *pgd, unsigned long addr, unsigned long end,
+static void __init alloc_init_pud(pgd_t *pgd, unsigned long addr, unsigned long end,
 	unsigned long phys, const struct mem_type *type)
 {
 	pud_t *pud = pud_offset(pgd, addr);

1.7.5.4