fix mode=autoupdate on CR48

pack_stub

 #!/bin/sh
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Version information. Please keep this in head of the updater.
 SHELLBALL_FWVERSION="REPLACE_FWVERSION"
 SHELLBALL_ECVERSION="REPLACE_ECVERSION"
 
 # All scripts should die on error unless commands are specifically excepted
@@ skipping 131 matching lines @@
       root shell:
 
       sudo chromeos-firmwareupdate --mode=recovery
       "
     fi
 
     # TODO(hungte) add some info here to tell user how to update firmware
     exit 0
     ;;
   --mode=autoupdate)
-    # This command is inside the stub for quick launch.
-    fw_version="$(crossystem fwid)"
-    ec_info="$(mosys -k ec info 2>/dev/null)" || ec_info=""
-    ec_version="$(eval "$ec_info"; echo "$fw_version")"
-    notify_update=0
-    verbose_message "ec_version: $ec_version ; ec_info: $ec_info"
-    if [ "$SHELLBALL_FWVERSION" != "$fw_version" ] &&
-       [ "$SHELLBALL_FWVERSION" != "IGNORE" ]; then
-      echo "System firmware update available: [$SHELLBALL_FWVERSION]"
-      echo "Currently installed system firmware: [$fw_version]"
-      notify_update=1
-    fi
-    if [ "$SHELLBALL_ECVERSION" != "$ec_version" ] &&
-       [ "$SHELLBALL_ECVERSION" != "IGNORE" ]; then
-      echo "EC firmware update available: [$SHELLBALL_ECVERSION]"
-      echo "Currently installed EC firmware: [$ec_version]"
-      notify_update=1
-    fi
-    if [ $notify_update -eq 0 ]; then
-      echo "
-      No firmware auto update is available. Returning gracefully.
-      "
-      exit 0
+    PLATFORM="$(/usr/sbin/mosys platform name 2>/dev/null || true)"
+    # Mario uses the old updater.
+    if [ "$PLATFORM" != "Mario" ] &&
+       [ "$PLATFORM" != "ZGA" ]; then
+      # This command is inside the stub for quick launch.
+      fw_version="$(crossystem fwid)"
+      ec_info="$(mosys -k ec info 2>/dev/null)" || ec_info=""
+      ec_version="$(eval "$ec_info"; echo "$fw_version")"
+      notify_update=0
+      verbose_message "ec_version: $ec_version ; ec_info: $ec_info"
+      if [ "$SHELLBALL_FWVERSION" != "$fw_version" ] &&
+         [ "$SHELLBALL_FWVERSION" != "IGNORE" ]; then
+        echo "System firmware update available: [$SHELLBALL_FWVERSION]"
+        echo "Currently installed system firmware: [$fw_version]"
+        notify_update=1
+      fi
+      if [ "$SHELLBALL_ECVERSION" != "$ec_version" ] &&
+         [ "$SHELLBALL_ECVERSION" != "IGNORE" ]; then
+        echo "EC firmware update available: [$SHELLBALL_ECVERSION]"
+        echo "Currently installed EC firmware: [$ec_version]"
+        notify_update=1
+      fi
+      if [ $notify_update -eq 0 ]; then
+        echo "
+        No firmware auto update is available. Returning gracefully.
+        "
+        exit 0
+      fi
     fi
     break
     ;;
   --force)
     force_flag=1
     shift
     ;;
   -h|"-?"|--help)
     echo "Shellball -- self-extract and install"
     echo ""
@@ skipping 75 matching lines @@
   fi
 fi
 
 verbose_message "Run built-in script ($SCRIPT) ..."
 if ! $SCRIPT "$@"; then
   error_exit "ERROR: $SCRIPT failed."
 fi
 exit 0
 
 # Below are uuencoded blob. Don't put code behind exit 0.