base-files: add protocol qmi/mbim support for ucidef_set_interface()

Make it possible to setup default WAN interface for devices with built-in LTE
modems, using QMI or MBIM.

Signed-off-by: Andrey Butirsky <[email protected]>
Reviewed-by: Lech Perczak <[email protected]>

package/base-files/files/bin/config_generate

@@ -207,6 +207,14 @@ generate_network() {
 				EOF
 			}
 		;;
+
+		qmi|\
+		mbim)
+			uci -q batch <<-EOF
+				set network.$1.proto='${protocol}'
+				set network.$1.pdptype='ipv4'
+			EOF
+		;;
 	esac
 }