kernel/generic: drop already upstreamed patch

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39855 3c298f89-4303-0410-b956-a3cf2f4a3e73
[tools] flex: upgrade to version 2.5.38

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39856 3c298f89-4303-0410-b956-a3cf2f4a3e73