meta-digi-dey: Added check if wlan1 interface already exist.

This commit verifies that the wlan1 interface is not already created
and will skip creating the virtual interface if it already exist.

Signed-off-by: Mike Engel <Mike.Engel@digi.com>

https://jira.digi.com/browse/DEL-3917

meta-digi-dey/recipes-core/init-ifupdown/init-ifupdown-1.0/ccimx6ul/virtwlans.sh

@@ -25,5 +25,7 @@ else
 	echo "program them referring to the Digi U-Boot Documentation"
 fi
 
-# This will create a second wireless network device
-iw dev wlan0 interface add wlan1 type managed
+if [ ! -d "/sys/class/net/wlan1" ]; then
+	# This will create a second wireless network device
+	iw dev wlan0 interface add wlan1 type managed
+fi