ubi-utils: add mirror md5sum

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43761 3c298f89-4303-0410-b956-a3cf2f4a3e73
kernel: remove openwrt micrel.c (replaced by upstream driver)

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43762 3c298f89-4303-0410-b956-a3cf2f4a3e73