mt76: update to the latest version, fixes some compile errors

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46513 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/kernel/mt76/Makefile

 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mt76
-PKG_VERSION:=2015-07-18
+PKG_VERSION:=2015-07-27
 PKG_RELEASE=1
 
 PKG_LICENSE:=GPLv2
@@ -10,7 +10,7 @@ PKG_LICENSE_FILES:=
 PKG_SOURCE_URL:=https://github.com/openwrt/mt76
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
-PKG_SOURCE_VERSION:=1cc86bafa7d77d6f7daaa92051fcd1c07dba681c
+PKG_SOURCE_VERSION:=f2a1c2b6a2226183d0f036c98c9fdc20fa69592e
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.xz
 
 PKG_MAINTAINER:=Felix Fietkau <nbd@openwrt.org>