acer-wmi: support integer return type from WMI methods

Acer WMID_GUID1/2 method's return value was declared to integer
type on Gateway notebook.
So, add this patch for support integer return type.

Reference: bko#33032
	https://bugzilla.kernel.org/show_bug.cgi?id=33032

Tested on Gateway NV5909H laptop
Tested-by: Filipus Klutiero <chealer@gmail.com>
Cc: Carlos Corbacho <carlos@strangeworlds.co.uk>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Corentin Chary <corentincj@iksaif.net>
Cc: Thomas Renninger <trenn@suse.de>
Signed-off-by: Lee, Chun-Yi <jlee@novell.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

drivers/platform/x86/acer-wmi.c

@@ -754,6 +754,8 @@ WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 		(obj->buffer.length == sizeof(u32) ||
 		obj->buffer.length == sizeof(u64))) {
 		tmp = *((u32 *) obj->buffer.pointer);
+	} else if (obj->type == ACPI_TYPE_INTEGER) {
+		tmp = (u32) obj->integer.value;
 	} else {
 		tmp = 0;
 	}
@@ -884,6 +886,8 @@ static acpi_status WMID_set_capabilities(void)
 		(obj->buffer.length == sizeof(u32) ||
 		obj->buffer.length == sizeof(u64))) {
 		devices = *((u32 *) obj->buffer.pointer);
+	} else if (obj->type == ACPI_TYPE_INTEGER) {
+		devices = (u32) obj->integer.value;
 	} else {
 		kfree(out.pointer);
 		return AE_ERROR;
@@ -1636,6 +1640,8 @@ static u32 get_wmid_devices(void)
 		(obj->buffer.length == sizeof(u32) ||
 		obj->buffer.length == sizeof(u64))) {
 		devices = *((u32 *) obj->buffer.pointer);
+	} else if (obj->type == ACPI_TYPE_INTEGER) {
+		devices = (u32) obj->integer.value;
 	}
 
 	kfree(out.pointer);