xfrm: simplify the check for necessary kernel support

[ -d /sys/module/xfrm_interface ] is enough to check if
CONFIG_XFRM_INTERFACE support was enabled in kernel.

Signed-off-by: Alin Nastac <[email protected]>

package/network/config/xfrm/Makefile

@@ -2,7 +2,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=xfrm
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 PKG_LICENSE:=GPL-2.0
 
 include $(INCLUDE_DIR)/package.mk

package/network/config/xfrm/files/xfrm.sh

@@ -68,5 +68,5 @@ proto_xfrm_init_config() {
 
 
 [ -n "$INCLUDE_ONLY" ] || {
-	[ -f /lib/modules/$(uname -r)/xfrm_interface.ko -o -d /sys/module/xfrm_interface ] && add_protocol xfrm
+	[ -d /sys/module/xfrm_interface ] && add_protocol xfrm
 }