greybus: interface: fix es2 boot-status mask

The ES2 boot status is stored in the least significant byte.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/interface.c

@@ -60,7 +60,7 @@ static int gb_interface_read_and_clear_boot_status(struct gb_interface *intf)
 	 */
 	if (intf->ddbl1_manufacturer_id == ES2_DDBL1_MFR_ID &&
 			intf->ddbl1_product_id == ES2_DDBL1_PROD_ID)
-		init_status = value;
+		init_status = value & 0xff;
 	else
 		init_status = value >> 24;