[][MAC80211][build][Fix patch fail]

[Description]
Fix patch fail
Add symbolic link of mt76-vendor for unified sigma support.
Remove unnecessary compiler flag in MT76 makefile

[Release-log]
N/A

Change-Id: Ia4e297c0648a77c4e500d926fb617cba6a1a85fb
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6140808
diff --git a/feed/mt76-vendor/Makefile b/feed/mt76-vendor/Makefile
index 7436e0d..92c1629 100644
--- a/feed/mt76-vendor/Makefile
+++ b/feed/mt76-vendor/Makefile
@@ -24,6 +24,7 @@
 define Package/mt76-vendor/install
 	mkdir -p $(1)/usr/sbin
 	$(INSTALL_BIN) $(PKG_BUILD_DIR)/mt76-vendor $(1)/usr/sbin
+	ln -s $(1)/usr/sbin/mt76-vendor $(1)/usr/sbin/mwctrl
 endef
 
 $(eval $(call BuildPackage,mt76-vendor))