mt76: update to the latest version to fix a build error (#19871)

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

SVN-Revision: 45990

package/kernel/mt76/Makefile

@@ -1,7 +1,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mt76
-PKG_VERSION:=2015-06-13
+PKG_VERSION:=2015-06-15
 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:=c772c3bc8967e88e790524eba7b62fce2917fd17
+PKG_SOURCE_VERSION:=ec91841868a554375b3019bcfaa13ae6d20fe91c
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.xz
 
 PKG_MAINTAINER:=Felix Fietkau <nbd@openwrt.org>