generic: use __meminit annotation for crashlog_init_memblock

generic: use __meminit annotation for crashlog_init_memblock

Fixes this section mismatch warning:
WARNING: vmlinux.o(.meminit.text+0xb14): Section mismatch in reference
from the function memblock_insert_region() to the function
.init.text:crashlog_init_memblock()
The function __meminit memblock_insert_region() references
a function __init crashlog_init_memblock().
If crashlog_init_memblock is only used by memblock_insert_region then
annotate crashlog_init_memblock with a matching annotation.

Also, remove the __init annotations from 'include/linux/crashlog.h'

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33137 3c298f89-4303-0410-b956-a3cf2f4a3e73