ucm2: common: pcm: hdmi: Add new macro to conditionally

ucm2: common: pcm: hdmi: Add new macro to conditionally

The new HdmiDevice macro can be used to create the hdmi PCM device for a
hardware PCM whose ID can be found in the Iec61937Devices comma separated
device ID list.
It is the caller's responsibility to pass correct device id of an HDMI PCM
as Dev.

The new macro needs Syntax 7 support.

Example for a use by sof-hda-dsp where the HDMI devices are 3, 4 and 5

Macro.0.HdmiDevice { Iec61937Devices "${var:Iec61937Pcms1}" Dev 3 Idx 0 }
Macro.1.HdmiDevice { Iec61937Devices "${var:Iec61937Pcms1}" Dev 4 Idx 1 }
Macro.2.HdmiDevice { Iec61937Devices "${var:Iec61937Pcms1}" Dev 5 Idx 2 }

If.HdmiIec61937 {
	Condition {
		Type RegexMatch
		Regex "((^|,)[345](,|$))"
		String "${var:Iec61937Pcms1}"
	}
	True.Macro.save_hdmi_cfg.HdmiPCMSave { Name "42-sof-hdmi" }
}

The Iec61937Pcms1 contains a match string of "5,4,3"

Closes: https://github.com/alsa-project/alsa-ucm-conf/pull/413
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>