ASoC: fsl: Rename stream name of SAI DAI driver

If stream names of DAI driver are duplicated there'll be warnings when
machine driver tries to add widgets on a route:

[ 8.831335] fsl-asoc-card sound-wm8960: ASoC: sink widget CPU-Playback overwritten
[ 8.839917] fsl-asoc-card sound-wm8960: ASoC: source widget CPU-Capture overwritten

Use different stream names to avoid such warnings.
DAI names in AUDMIX are also updated accordingly.

Fixes: 15c958390460 ("ASoC: fsl_sai: Add separate DAI for transmitter and receiver")
Signed-off-by: Chancel Liu <[e-mail]>
Acked-by: Shengjiu Wang <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/fsl/fsl_sai.c

···
 	{
 		.name = "sai-tx",
 		.playback = {
-			.stream_name = "CPU-Playback",
+			.stream_name = "SAI-Playback",
 			.channels_min = 1,
 			.channels_max = 32,
-				.rate_min = 8000,
+			.rate_min = 8000,
 			.rate_max = 2822400,
 			.rates = SNDRV_PCM_RATE_KNOT,
 			.formats = FSL_SAI_FORMATS,
···
 	{
 		.name = "sai-rx",
 		.capture = {
-			.stream_name = "CPU-Capture",
+			.stream_name = "SAI-Capture",
 			.channels_min = 1,
 			.channels_max = 32,
 			.rate_min = 8000,

sound/soc/fsl/imx-audmix.c

···
 static const char *name[][3] = {
 	{"HiFi-AUDMIX-FE-0", "HiFi-AUDMIX-FE-1", "HiFi-AUDMIX-FE-2"},
 	{"sai-tx", "sai-tx", "sai-rx"},
-	{"AUDMIX-Playback-0", "AUDMIX-Playback-1", "CPU-Capture"},
-	{"CPU-Playback", "CPU-Playback", "AUDMIX-Capture-0"},
+	{"AUDMIX-Playback-0", "AUDMIX-Playback-1", "SAI-Capture"},
+	{"SAI-Playback", "SAI-Playback", "AUDMIX-Capture-0"},
 };
 
 static int imx_audmix_probe(struct platform_device *pdev)