ALSA: hdspm - Provide ALSA control to disable 96K frames

For 96kHz, MADI allows to multiplex the samples (SMUX) or to use a
dedicated 96K mode. The RME cards default to 96K mode, but since not all
external MADI equipment supports this, provide a switch to users that
changes the on-wire protocol to SMUX.
Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/rme9652/hdspm.c

@@ -4192,6 +4192,7 @@ static struct snd_kcontrol_new snd_hdspm_controls_madi[] = {
 	HDSPM_SYNC_CHECK("SYNC IN SyncCheck", 3),
 	HDSPM_TOGGLE_SETTING("Line Out", HDSPM_LineOut),
 	HDSPM_TOGGLE_SETTING("TX 64 channels mode", HDSPM_TX_64ch),
+	HDSPM_TOGGLE_SETTING("Disable 96K frames", HDSPM_SMUX),
 	HDSPM_TOGGLE_SETTING("Clear Track Marker", HDSPM_clr_tms),
 	HDSPM_TOGGLE_SETTING("Safe Mode", HDSPM_AutoInp),
 	HDSPM_INPUT_SELECT("Input Select", 0),