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

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/77a64e8bffb7e7cb1ce46424fd188e2b997433fc

commit 77a64e8bffb7e7cb1ce46424fd188e2b997433fc
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Sat Jun 17 12:17:27 2017 +0200

    mt76: update to the latest version, fixes rate control issues
    
    Should improve performance considerably in many cases
    
    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 bbcc72c..5753520 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:=2017-05-30
-PKG_SOURCE_VERSION:=ef5b045ddf52d7033da5270c7a6ce195df24bd24
-PKG_MIRROR_HASH:=4a13b61275b16f840c4856b58633b0c11e8ab18e4111c90265153317730df696
+PKG_SOURCE_DATE:=2017-06-16
+PKG_SOURCE_VERSION:=70d225123fa106667fb96265fe62162339e36ddc
+PKG_MIRROR_HASH:=f3ee626ac485398488ca6c549e44ffaff72dc8ac324f53af7994c9bb0ca8925f
 
 PKG_MAINTAINER:=Felix Fietkau <nbd at nbd.name>
 PKG_BUILD_PARALLEL:=1