fix(deck): Check if micro SD card is mounted before attempting to mount

system_files/deck/usr/lib/hwsupport/steamos-automount.sh

@@ -64,13 +64,14 @@ do_mount()
     fi
 
     mount_point=/mnt/sdcard
+    if [[ ! -d "${mount_point}" ]]; then
         mkdir -p "${mount_point}"
         /bin/mount "${DEVICE}" "${mount_point}"
-
         if [[ $? -ne 0 ]]; then
-        echo "Error mounting ${DEVICE} (status = $ret)"
+            echo "Error mounting ${DEVICE}"
             exit 1
         fi
+    fi
 
     # Workaround for for Steam compression bug
     for d in "${mount_point}"/steamapps/{downloading,temp} ; do