imx: cortexa53: add 'gateworks,imx8m*' to sysupgrade board checks

The upstream device-tree files are now using 'gateworks' instead of 'gw'
for compatible. Add this pattern so that the newer boards support
sysupgrade.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Link: https://github.com/openwrt/openwrt/pull/17964
(cherry picked from commit ee73d35fbe)
Link: https://github.com/openwrt/openwrt/pull/18093
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

target/linux/imx/cortexa53/base-files/lib/upgrade/platform.sh

@@ -12,6 +12,7 @@ platform_check_image() {
 	local board=$(board_name)
 
 	case "$board" in
+	gateworks,imx8m*|\
 	gw,imx8m*)
 		return 0
 		;;
@@ -25,6 +26,7 @@ platform_do_upgrade() {
 	local board=$(board_name)
 
 	case "$board" in
+	gateworks,imx8m*|\
 	gw,imx8m*)
 		export_bootdevice && export_partdevice diskdev 0 || {
 			echo "Unable to find root device."
@@ -41,6 +43,7 @@ platform_copy_config() {
 	local partdev
 
 	case "$board" in
+	gateworks,imx8m*|\
 	gw,imx8m*)
 		export_partdevice partdev 1 && {
 			v "Storing $UPGRADE_BACKUP on /dev/$partdev..."