uqmi: added timeout to fix hanging qmi.sh

Modems which are using qmi do not reply on the 1st sync but they do
on subsequent. So qmi.sh is hanging on the first call. Since 2020 uqmi
supports a timeout parameter. Unfortunately qmi.sh didn't make use of
this parameter. So qmi.sh is now invoking an early dummy access to
unlock the modem

Signed-off-by: Uwe Niethammer <uwe@dr-niethammer.de>
(cherry picked from commit 32a696f9e4)

package/network/utils/uqmi/files/lib/netifd/proto/qmi.sh

@@ -83,6 +83,8 @@ proto_qmi_setup() {
 
 	echo "Waiting for SIM initialization"
 	local uninitialized_timeout=0
+	# timeout 3s for first call to avoid hanging uqmi
+	uqmi -d "$device" --get-pin-status -t 3000 > /dev/null 2>&1
 	while uqmi -s -d "$device" --get-pin-status | grep '"UIM uninitialized"' > /dev/null; do
 		[ -e "$device" ] || return 1
 		if [ "$uninitialized_timeout" -lt "$timeout" -o "$timeout" = "0" ]; then