ACPI / EC: Add ASUSTEK L4R to quirk list in order to validate ECDT

commit 524f42fa upstream.

The ECDT of ASUSTEK L4R doesn't provide correct command and data
I/O ports.  The DSDT provides the correct information instead.

For this reason, add this machine to quirk list for ECDT validation
and use the EC information from the DSDT.

[rjw: Changelog]
References: https://bugzilla.kernel.org/show_bug.cgi?id=60765Reported-and-tested-by: Daniele Esposti <expo@expobrain.net>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

drivers/acpi/ec.c

@@ -964,6 +964,10 @@ static struct dmi_system_id __initdata ec_dmi_table[] = {
 	ec_enlarge_storm_threshold, "CLEVO hardware", {
 	DMI_MATCH(DMI_SYS_VENDOR, "CLEVO Co."),
 	DMI_MATCH(DMI_PRODUCT_NAME, "M720T/M730T"),}, NULL},
+	{
+	ec_validate_ecdt, "ASUS hardware", {
+	DMI_MATCH(DMI_SYS_VENDOR, "ASUSTek Computer Inc."),
+	DMI_MATCH(DMI_PRODUCT_NAME, "L4R"),}, NULL},
 	{},
 };