Fix SC2155 & SC2012

Author: RadxaYuntian

src/radxa-otgutils

@@ -73,7 +73,8 @@ start()
             ;;
     esac
 
-    local UDC=$(ls /sys/class/udc/ | head -1)
+    local UDC=
+    UDC="$(basename "$(find /sys/class/udc -maxdepth 1 -mindepth 1 | sort | head -1)")"
     if [ -z "$UDC" ]; 
     then
         echo "No USB Device Controller was detected. Did you set your OTG port to host mode?"