platform/x86: touchscreen_dmi: Drop comma in terminator line

There is no need to have comma in terminator line. This will help
to find a potentially broken entries, due to placing after it,
during compilation time.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/platform/x86/touchscreen_dmi.c

@@ -1212,7 +1212,7 @@ const struct dmi_system_id touchscreen_dmi_table[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "Y8W81"),
 		},
 	},
-	{ },
+	{ }
 };
 
 static const struct ts_dmi_data *ts_data;