ramips-mt7620: add support for tp-link archer c20 v1 (#1866)

Specification:
- MediaTek MT7620A (580 Mhz)
- 64 MB of RAM
- 8 MB of FLASH
- 2T2R 2.4 GHz and 1T1R 5 GHz
- 5x 10/100 Mbps Ethernet
- 2x external, non-detachable antennas
- UART (J1) header on PCB (115200 8n1)
- 8x LED (GPIO-controlled*), 2x button, power input switch
- 1 x USB 2.0 port

docs/user/supported_devices.rst

@@ -303,6 +303,7 @@ ramips-mt7620
 * TP-Link
 
   - Archer C2 v1
+  - Archer C20 (v1)
   - Archer C20i
   - Archer C50 v1
 

package/gluon-core/luasrc/lib/gluon/upgrade/010-primary-mac

@@ -61,7 +61,7 @@ elseif platform.match('mpc85xx', 'p1020', {'aerohive,hiveap-330'}) then
   table.insert(try_files, 1, '/sys/class/net/eth0/address')
 elseif platform.match('mpc85xx', 'p1020', {'ocedo,panda'}) then
   table.insert(try_files, 1, '/sys/class/net/eth1/address')
-elseif platform.match('ramips', 'mt7620', {'miwifi-mini', 'tplink,c2-v1', 'c20i', 'c50'}) then
+elseif platform.match('ramips', 'mt7620', {'miwifi-mini', 'tplink,c2-v1', 'c20-v1', 'c20i', 'c50'}) then
   table.insert(try_files, 1, '/sys/class/net/eth0/address')
 elseif platform.match('ramips', 'mt7621', {'dir-860l-b1'}) then
   table.insert(try_files, 1, '/sys/class/ieee80211/phy1/macaddress')

targets/ramips-mt7620

@@ -31,7 +31,6 @@ device('nexx-wt3020-8m', 'wt3020-8M', {
 	},
 })
 
-
 -- TP-Link
 
 local tplink_region_suffix = ''
@@ -43,6 +42,8 @@ device('tp-link-archer-c2-v1', 'tplink_c2-v1', {
         factory = false,
 })
 
+device('tp-link-archer-c20-v1', 'tplink_c20-v1')
+
 device('tp-link-archer-c20i', 'ArcherC20i')
 
 device('tp-link-archer-c50', 'ArcherC50v1', {