Revert "mt76: update to the latest version, adds a tx queue configuration fix"

This reverts commit 32867540ea.
A report indicates that this causes a tx/rx throughput regression

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

package/kernel/mt76/Makefile

@@ -1,7 +1,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mt76
-PKG_VERSION:=2016-11-03
+PKG_VERSION:=2016-08-25
 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:=adf1bbd03cc7e1117d44b3da4e584f6dd590c4d0
+PKG_SOURCE_VERSION:=c3127d2acc354b4a27c8604716b0591093601971
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.xz
 
 PKG_MAINTAINER:=Felix Fietkau <nbd@nbd.name>