kernel 3.6+: switch to a crc32 implementation that is more suitable for small...

kernel 3.6+: switch to a crc32 implementation that is more suitable for small caches. reduces kernel image size by ~22 KiB on mips

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34461 3c298f89-4303-0410-b956-a3cf2f4a3e73