Add missing kmod-7915e package to get both wireless interfaces working.
Link: https://github.com/openwrt/openwrt/issues/18690
Reviewed-by: Steffen Förster <nemesis@chemnitz.freifunk.net>
Signed-off-by: Christoph Krapp <achterin@gmail.com>
(cherry picked from commit 0d6ba33181)