[source] mt76: update to the latest version, fixes stability issues

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/e3d135ab56dae3fbb9bbc04a7a18f766c2d70749

commit e3d135ab56dae3fbb9bbc04a7a18f766c2d70749
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Fri Jul 21 18:53:32 2017 +0200

    mt76: update to the latest version, fixes stability issues
    
    8a649c3 mt7603: mac: code optimization
    8dee788 mt7603: mac: stop netdev queues during watchdog reset
    3c4c9a6 tx: move state check in mt76_txq_send_burst()
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 package/kernel/mt76/Makefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/package/kernel/mt76/Makefile b/package/kernel/mt76/Makefile
index 1cb4565..8fa3267 100644
--- a/package/kernel/mt76/Makefile
+++ b/package/kernel/mt76/Makefile
@@ -8,9 +8,9 @@ PKG_LICENSE_FILES:=
 
 PKG_SOURCE_URL:=https://github.com/openwrt/mt76
 PKG_SOURCE_PROTO:=git
-PKG_SOURCE_DATE:=2017-07-04
-PKG_SOURCE_VERSION:=e90a81a5523e567efb1fe33bac677cfac644101f
-PKG_MIRROR_HASH:=6c40885a4f29f6842b6426568ae7d4b6c3e91f4a510c475e8fecaec03ae5f2f2
+PKG_SOURCE_DATE:=2017-07-17
+PKG_SOURCE_VERSION:=3c4c9a647e4feff3a42ee94d477041fdcf26c463
+PKG_MIRROR_HASH:=7ed7ef6356fafc2525cb6204ca2a3d584c1b83340ef5a1f7c581052f3a1982b1
 
 PKG_MAINTAINER:=Felix Fietkau <nbd at nbd.name>
 PKG_BUILD_PARALLEL:=1