mt76: update to the latest version

c66094e mt76x2: fix possible NULL pointer dereferencing in mt76x2_tx()
249fa2d mt76x2: fix warning in ieee80211_get_key_rx_seq()
54d6710 mt76: use mt76_poll_msec routine in mt76pci_load_firmware()
eb359f1 mt76x2: remove unnecessary len variable in mt76x2_eeprom_load()
7e6e00b mt76: initialize available_antennas_{tx,rx} info
6469dca mt76: add mt76_init_stream_cap routine
ced433d mt76x2: add mac80211 {set,get}_antenna callbacks
238f3f1 mt76x2: remove warnings in mt76x2_mac_write_txwi()
880611b mt7603: main: fix warning in ieee80211_get_key_rx_seq()
bc35af8 mt76x2: fix tssi initialization for 5GHz band
700ed20 mt76x2: make mt76x2_mac_reset routine static
6e7d5ce mt76x2: remove unnecessary MT_TX_ALC_CFG_4 configuration
5153ece mt76x2: set default values in TX_ALC_CFG_{1,2} for tempetaure compensation
a3e7740 mt76x2: fix tx_alc_enabled check

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

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:=2018-02-27
-PKG_SOURCE_VERSION:=ffa2069e78cf267ce79d7a8820aa0368161ff6e1
-PKG_MIRROR_HASH:=dee90d713e3c351ee51da51030e56867fa9bd2eac8f222734d0573223a5e0a41
+PKG_SOURCE_DATE:=2018-04-09
+PKG_SOURCE_VERSION:=a3e7740ab829221eac4a262b40531f70fd4f071a
+PKG_MIRROR_HASH:=3f196a3205ff83a3bfa56710ea42fb5b68435b8aef645c2575c902371c197a77
 
 PKG_MAINTAINER:=Felix Fietkau <nbd@nbd.name>
 PKG_BUILD_PARALLEL:=1