ASoC: msm: qdsp6v2: add support to enable 4-channel QUAT TDM recording

Add the corresponding 'cap_mask' to support 4 slots configuration in
CPU DAI driver to enable 4-channel QUAT TDM recording feature on SDM845.

Change-Id: I137d874b00fadde7513ab6c843f61becc74feac1
Signed-off-by: Xiaoyu Ye <[email protected]>

asoc/msm-dai-q6-v2.c

@@ -6104,11 +6104,14 @@ static int msm_dai_q6_tdm_set_tdm_slot(struct snd_soc_dai *dai,
 		return -EINVAL;
 	}
 
-	/* HW only supports 16 and 8 slots configuration */
+	/* HW supports 1-32 slots configuration. Typical: 1, 2, 4, 8, 16, 32 */
 	switch (slots) {
 	case 2:
 		cap_mask = 0x03;
 		break;
+	case 4:
+		cap_mask = 0x0F;
+		break;
 	case 8:
 		cap_mask = 0xFF;
 		break;