ar71xx: correctly detect hardware revision on TP-LINK Archer C5 and C7

Signed-off-by: Matthias Schiffer <[email protected]>

SVN-Revision: 42797

target/linux/ar71xx/base-files/lib/ar71xx.sh

@@ -214,6 +214,13 @@ tplink_board_detect() {
 	"934100"*)
 		model="NC-LINK SMART-300"
 		;;
+	"c50000"*)
+		model="TP-Link Archer C5"
+		;;
+	"750000"*|\
+	"c70000"*)
+		model="TP-Link Archer C7"
+		;;
 	*)
 		hwver=""
 		;;