mac80211: fix a module build/dependency issue that was breaking lib80211

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/kernel/mac80211/patches/007-fix_duplicate_skcipher_backport.patch

@@ -0,0 +1,11 @@
+--- a/compat/Makefile
++++ b/compat/Makefile
+@@ -35,8 +35,6 @@ compat-$(CPTCFG_KERNEL_4_6) += backport-
+ 
+ compat-$(CPTCFG_BPAUTO_BUILD_CRYPTO_CCM) += crypto-ccm.o
+ compat-$(CPTCFG_BPAUTO_CRYPTO_SKCIPHER) += crypto-skcipher.o
+-skcipher-objs += crypto-skcipher.o
+-obj-$(CPTCFG_BPAUTO_CRYPTO_SKCIPHER) += skcipher.o
+ compat-$(CPTCFG_BPAUTO_BUILD_WANT_DEV_COREDUMP) += drivers-base-devcoredump.o
+ compat-$(CPTCFG_BPAUTO_RHASHTABLE) += lib-rhashtable.o
+ cordic-objs += lib-cordic.o