ASoC: fsl_audmux: Fix amixer write errors

This reverts commit 944c517b ("ASoC: fsl_audmix: make clock and
output src write only").

There is error after making clock and output src write only

$amixer -c imxaudmix cset numid=1 1
amixer: Cannot read the given element from control sysdefault:3

Which is worse than before, so let's revert the change.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1662446961-20799-1-git-send-email-shengjiu.wang@nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_audmix.c

@@ -199,18 +199,10 @@ static int fsl_audmix_put_out_src(struct snd_kcontrol *kcontrol,
 
 static const struct snd_kcontrol_new fsl_audmix_snd_controls[] = {
 	/* FSL_AUDMIX_CTR controls */
-	{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
-		.name = "Mixing Clock Source",
-		.info = snd_soc_info_enum_double,
-		.access = SNDRV_CTL_ELEM_ACCESS_WRITE,
-		.put = fsl_audmix_put_mix_clk_src,
-		.private_value = (unsigned long)&fsl_audmix_enum[0] },
-	{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
-		.name = "Output Source",
-		.info = snd_soc_info_enum_double,
-		.access = SNDRV_CTL_ELEM_ACCESS_WRITE,
-		.put = fsl_audmix_put_out_src,
-		.private_value = (unsigned long)&fsl_audmix_enum[1] },
+	SOC_ENUM_EXT("Mixing Clock Source", fsl_audmix_enum[0],
+		     snd_soc_get_enum_double, fsl_audmix_put_mix_clk_src),
+	SOC_ENUM_EXT("Output Source", fsl_audmix_enum[1],
+		     snd_soc_get_enum_double, fsl_audmix_put_out_src),
 	SOC_ENUM("Output Width", fsl_audmix_enum[2]),
 	SOC_ENUM("Frame Rate Diff Error", fsl_audmix_enum[3]),
 	SOC_ENUM("Clock Freq Diff Error", fsl_audmix_enum[4]),