modules: bump OpenWrt

594f731e04 ramips: fix Archer C20i wireless MAC address
037a151c56 ramips: fix Archer C2 v1 5GHz MAC address
3e8b66e0da ramips: add system LED indicators for TP-Link C20i
80e0b97d07 ramips: convert TP-Link MT7620 boards to tpt trigger
a2e2c40b5e mt76: update to the latest openwrt-19.07 version
1f927bd2f0 ramips: fix inverted reset button for Ravpower WD03

Compile-tested: ramips-mt7621
Run-tested: ramips-mt7621

modules

@@ -2,7 +2,7 @@ GLUON_FEEDS='packages routing gluon'
 
 OPENWRT_REPO=https://git.openwrt.org/openwrt/openwrt.git
 OPENWRT_BRANCH=openwrt-19.07
-OPENWRT_COMMIT=7ab5dc77b223fd71e07ac5b8eb2f32852e804db9
+OPENWRT_COMMIT=594f731e04f5442c94a4cfb57c7d46d7513fa9ce
 
 PACKAGES_PACKAGES_REPO=https://github.com/openwrt/packages.git
 PACKAGES_PACKAGES_BRANCH=openwrt-19.07