memblock: annotate memblock_is_reserved() with __init_memblock

Found warning:

WARNING: EXPORT symbol "gsi_write_channel_scratch" [vmlinux] version generation failed, symbol will not be versioned.
WARNING: vmlinux.o(.text+0x1e0a0): Section mismatch in reference from the function valid_phys_addr_range() to the function .init.text:memblock_is_reserved()
The function valid_phys_addr_range() references
the function __init memblock_is_reserved().
This is often because valid_phys_addr_range lacks a __init
annotation or the annotation of memblock_is_reserved is wrong.

Use __init_memblock instead of __init.

Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Yueyi Li <[e-mail]>
Acked-by: Michal Hocko <[e-mail]>
Reviewed-by: David Hildenbrand <[e-mail]>
Acked-by: Mike Rapoport <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

mm/memblock.c

···
 	return -1;
 }
 
-bool __init memblock_is_reserved(phys_addr_t addr)
+bool __init_memblock memblock_is_reserved(phys_addr_t addr)
 {
 	return memblock_search(&memblock.reserved, addr) != -1;
 }