The makefile recipe is wrong and a module compilation tries
to build each object individually. Fix that. This allows to
build the dsa driver as a module.
Suggested-by: Balázs Triszka <info@balika011.hu>
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/22121
Signed-off-by: Robert Marko <robimarko@gmail.com>