kernel: fix section mismatch in crashlog

kernel: fix section mismatch in crashlog

The function memblock_insert_region() is in the section
__init_memblock, also put crashlog_init_memblock there.

This fixes this section mismatch warning:
The function memblock_insert_region.isra.1() references
the function __meminit crashlog_init_memblock().
This is often because memblock_insert_region.isra.1 lacks a __meminit
annotation or the annotation of crashlog_init_memblock is wrong.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@48931 3c298f89-4303-0410-b956-a3cf2f4a3e73