ACPI: autoload modules - Create __mod_acpi_device_table symbol for all ACPI drivers

modpost is going to use these to create e.g. acpi:ACPI0001
in modules.alias.

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 10e8510..469f3f5 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -41,7 +41,6 @@
 #include <acpi/actypes.h>
 
 #define ACPI_EC_CLASS			"embedded_controller"
-#define ACPI_EC_HID			"PNP0C09"
 #define ACPI_EC_DEVICE_NAME		"Embedded Controller"
 #define ACPI_EC_FILE_INFO		"info"
 
@@ -82,10 +81,15 @@
 static int acpi_ec_stop(struct acpi_device *device, int type);
 static int acpi_ec_add(struct acpi_device *device);
 
+static const struct acpi_device_id ec_device_ids[] = {
+	{"PNP0C09", 0},
+	{"", 0},
+};
+
 static struct acpi_driver acpi_ec_driver = {
 	.name = "ec",
 	.class = ACPI_EC_CLASS,
-	.ids = ACPI_EC_HID,
+	.ids = ec_device_ids,
 	.ops = {
 		.add = acpi_ec_add,
 		.remove = acpi_ec_remove,