mt76: add missing file

Signed-off-by: Felix Fietkau <[email protected]>

package/kernel/mt76/Makefile

@@ -9,8 +9,8 @@ PKG_LICENSE_FILES:=
 PKG_SOURCE_URL:=https://github.com/openwrt/mt76
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_DATE:=2021-04-11
-PKG_SOURCE_VERSION:=6b293c411d22b2bbcc5231be47905f51e1898039
-PKG_MIRROR_HASH:=5318164ccc6a81774b12e2d7fca8d4dbf1882d46335669c0911ac7cd75b1746d
+PKG_SOURCE_VERSION:=bf45b30d891961dd7c4139dddb58b909ea2c2b5a
+PKG_MIRROR_HASH:=431cecf80dafa986e805f809522721c2bb26289867d6770695d49baf8b471bea
 
 PKG_MAINTAINER:=Felix Fietkau <[email protected]>
 PKG_BUILD_PARALLEL:=1