ar71xx: rework GainStrong devices support

- combine support for Oolite/MiniBox V1.0 in single mach-*.c file
- fix model/board names
- include correct/full vendor name
- drop redundant package and factory image

Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>

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

@@ -398,7 +398,7 @@ platform_check_image() {
 	omy-g1|\
 	omy-x1|\
 	onion-omega|\
-	oolite|\
+	oolite-v1|\
 	packet-squirrel|\
 	re355|\
 	re450|\