fixup! postmarketos-initramfs: clean up logging

golfed a bit to get it to pass this: https://www.shellcheck.net/wiki/SC2012

[ci:ignore-count]

main/postmarketos-initramfs/init_functions.sh

@@ -626,7 +626,7 @@ setup_usb_network_android() {
 get_usb_udc() {
 	local _udc_dev="${deviceinfo_usb_network_udc:-}"
 	if [ -z "$_udc_dev" ]; then
-		_udc_dev=$(ls /sys/class/udc | head -1)
+		_udc_dev=$(find /sys/class/udc/* -printf "%f\n" -quit)
 	fi
 
 	echo "$_udc_dev"