ipq806x: base-files: add support for Linksys EA8500

Signed-off-by: Adrian Panella <ianchi74@outlook.com>

target/linux/ipq806x/base-files/lib/upgrade/platform.sh

@@ -8,6 +8,7 @@ platform_check_image() {
 	case "$board" in
 	ap148 |\
 	d7800 |\
+	ea8500 |\
 	r7500)
 		nand_do_platform_check $board $1
 		return $?;
@@ -34,6 +35,9 @@ platform_pre_upgrade() {
 	r7500)
 		nand_do_upgrade "$1"
 		;;
+	ea8500)
+		linksys_preupgrade "$1"
+		;;
 	esac
 }
 
@@ -46,5 +50,8 @@ platform_do_upgrade() {
 		MTD_CONFIG_ARGS="-s 0x200000"
 		default_do_upgrade "$ARGV"
 		;;
+	ea8500)
+		platform_do_upgrade_linksys "$ARGV"
+		;;
 	esac
 }