ASoC: SOF: imx: Use ARRAY_SIZE instead of hardcoded value

With this change we no longer need to update num_drv when adding
new DAI driver.
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20200720072046.8152-3-daniel.baluta@oss.nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/imx/imx8.c

@@ -415,7 +415,7 @@ struct snd_sof_dsp_ops sof_imx8_ops = {
 
 	/* DAI drivers */
 	.drv = imx8_dai,
-	.num_drv = 1, /* we have only 1 ESAI interface on i.MX8 */
+	.num_drv = ARRAY_SIZE(imx8_dai),
 
 	/* ALSA HW info flags */
 	.hw_info =	SNDRV_PCM_INFO_MMAP |
@@ -455,7 +455,7 @@ struct snd_sof_dsp_ops sof_imx8x_ops = {
 
 	/* DAI drivers */
 	.drv = imx8_dai,
-	.num_drv = 1, /* we have only 1 ESAI interface on i.MX8 */
+	.num_drv = ARRAY_SIZE(imx8_dai),
 
 	/* ALSA HW info flags */
 	.hw_info =	SNDRV_PCM_INFO_MMAP |

sound/soc/sof/imx/imx8m.c

@@ -280,7 +280,7 @@ struct snd_sof_dsp_ops sof_imx8m_ops = {
 
 	/* DAI drivers */
 	.drv = imx8m_dai,
-	.num_drv = 1, /* we have only 1 SAI interface on i.MX8M */
+	.num_drv = ARRAY_SIZE(imx8m_dai),
 
 	.hw_info = SNDRV_PCM_INFO_MMAP |
 		SNDRV_PCM_INFO_MMAP_VALID |