om-watchdog: add support for Teltonika RUT5xx (ramips)

Add rut5xx GPIO PIN selection to om-package startup script.

Testet on a RUT500 device, the timeout value of the hardware watchdog
is about 280 sec.

Signed-off-by: Steffen Weinreich <steve@weinreich.org>
[split into two commits, bump PKG_RELEASE]
Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>

package/kernel/om-watchdog/Makefile

@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=om-watchdog
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 PKG_VERSION:=1
 
 include $(INCLUDE_DIR)/package.mk

package/kernel/om-watchdog/files/om-watchdog.init

@@ -48,6 +48,15 @@ get_gpio() {
 			return 17
 			;;
 		esac
+	elif [ -r /lib/ramips.sh ]; then
+		. /lib/ramips.sh
+		local board=$(ramips_board_name)
+
+		case "$board" in
+		"rut5xx")
+			return 11
+			;;
+		esac
 	else
 		#we assume it is om1p in this case
 		return 3