ramips: implement sysupgrade support for whr-300hp2

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45842 3c298f89-4303-0410-b956-a3cf2f4a3e73

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

@@ -95,6 +95,7 @@ platform_check_image() {
 	w306r-v20 |\
 	w502u |\
 	whr-g300n |\
+	whr-300hp2 |\
 	whr-600d |\
 	whr-1166d |\
 	wsr-600 |\