kernel: merge two mtdpart.c patches

It does not make sense to add some code and remove is 4 patches later.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@42673 3c298f89-4303-0410-b956-a3cf2f4a3e73