kernel: drop 010-mtd_mp25p80_add_gd25q32_gd25q64.patch

The patch in question has been accepted upstream in commit:

55bf75b7dd8ec875d048824f3cdecf8254e292e5

Signed-off-by: Luka Perkov <luka@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@37807 3c298f89-4303-0410-b956-a3cf2f4a3e73