gluon-core: allow WPA3 features on ramips-mt7620

Backporting the MFP patch allows us to utilize WPA3 features on this
target.

Tested on TP-Link Archer C20i

package/gluon-core/luasrc/usr/lib/lua/gluon/platform.lua

@@ -66,7 +66,7 @@ end
 
 function M.device_supports_wpa3()
 	-- rt2x00 crashes when enabling WPA3 personal / OWE VAP
-	if M.match('ramips', 'rt305x') or M.match('ramips', 'mt7620') then
+	if M.match('ramips', 'rt305x') then
 		return false
 	end