thinkpad-acpi: module autoloading for newer Lenovo ThinkPads.

The newer Lenovo ThinkPads have HKEY HID of LEN0068 instead
of IBM0068. Added new HID so that thinkpad_acpi module will
auto load on these newer Lenovo ThinkPads.

Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: stable@kernel.org
Signed-off-by: Manoj Iyer <manoj.iyer@canonical.com>
Signed-off-by: Andy Lutomirski <luto@mit.edu>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

drivers/platform/x86/thinkpad_acpi.c

@@ -128,7 +128,8 @@ enum {
 };
 
 /* ACPI HIDs */
-#define TPACPI_ACPI_HKEY_HID		"IBM0068"
+#define TPACPI_ACPI_IBM_HKEY_HID	"IBM0068"
+#define TPACPI_ACPI_LENOVO_HKEY_HID	"LEN0068"
 #define TPACPI_ACPI_EC_HID		"PNP0C09"
 
 /* Input IDs */
@@ -3879,7 +3880,8 @@ errexit:
 }
 
 static const struct acpi_device_id ibm_htk_device_ids[] = {
-	{TPACPI_ACPI_HKEY_HID, 0},
+	{TPACPI_ACPI_IBM_HKEY_HID, 0},
+	{TPACPI_ACPI_LENOVO_HKEY_HID, 0},
 	{"", 0},
 };