dm: script: export gpio460 for wifi reset

GPIO460 is used to reset wifi chip on apl-mab.
Export the GPIO pin to userspace so that it can be used in device model.

Tracked-On: #2328
Signed-off-by: Binbin Wu <binbin.wu@intel.com>

devicemodel/samples/apl-mrb/launch_uos.sh

@@ -360,7 +360,7 @@ fi
    --mac_seed $mac_seed \
    -s 27,passthru,0/1b/0 \
    -s 24,passthru,0/18/0 \
-   -s 18,passthru,3/0/0,keep_gsi \
+   -s 18,passthru,3/0/0,keep_gsi,gpio_rst,460 \
    $intr_storm_monitor \
    $boot_ipu_option      \
    -i /run/acrn/ioc_$vm_name,0x20 \
@@ -410,6 +410,13 @@ do
 	esac
 done
 
+if [ ! -f "/sys/class/gpio/gpio460" ]; then
+  echo "export gpio460"
+  echo 460 > /sys/class/gpio/export
+  echo out > /sys/class/gpio/gpio460/direction
+  echo 1 > /sys/class/gpio/gpio460/value
+fi
+
 if [ ! -b "/dev/mmcblk1p3" ]; then
   echo "no /dev/mmcblk1p3 data partition, exit"
   exit