ALSA: hda - Add api_version to hda_device_id struct

For distinguishing the difference between HDA legacy and ext codec
driver entries, we need to expose the value corresponding to type
field.  This patch adds a new field, api_version, to hda_device_id
struct, so that this information is embedded in modalias string.

Although the information is basically redundant (struct hdac_device
already has type field), the helper that extracts from
MODULE_DEVICE_TABLE() won't take it account except for the exported
table entries themselves.  So we need to put the same information in
the table, too.

Reviewed-by: Vinod Koul <vinod.koul@intel.com>
Tested-by: Subhransu S Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/hdaudio.h

@@ -33,6 +33,7 @@ extern struct bus_type snd_hda_bus_type;
 struct hda_device_id {
 	__u32 vendor_id;
 	__u32 rev_id;
+	__u8 api_version;
 	const char *name;
 	unsigned long driver_data;
 };