ASoC: fsl_easrc: Fix duplicate debufs entries

Merge series from Alexander Stein <[e-mail]>:

this series fixes the error regarding duplicate debugfs directory creation on
TQMa8MPxL (imx8mp) when easrc is enabled:
debugfs: '30c90000.easrc' already exists in 'tqm-tlv320aic32'

This is caused because fsl_easrc adds two components which use the device name
as component name. Debugfs directories for each component is created, resulting
on name conflict. Fix this by adding the debugfs_prefix for both component
drivers.

Before:
$ ls /sys/kernel/debug/asoc/tqm-tlv320aic32/
30c30000.sai 30c90000.easrc HiFi-ASRC-FE dapm dapm_pop_time
dma:30c30000.sai tlv320aic32x4.1-0018

After:
$ ls /sys/kernel/debug/asoc/tqm-tlv320aic32/
30c30000.sai HiFi-ASRC-FE asrc:30c90000.easrc dapm dapm_pop_time
dma:30c30000.sai easrc:30c90000.easrc tlv320aic32x4.1-0018

sound/soc/fsl/fsl_asrc_dma.c

···
 	.pointer	= fsl_asrc_dma_pcm_pointer,
 	.pcm_construct	= fsl_asrc_dma_pcm_new,
 	.legacy_dai_naming = 1,
+#ifdef CONFIG_DEBUG_FS
+	.debugfs_prefix	= "asrc",
+#endif
 };
 EXPORT_SYMBOL_GPL(fsl_asrc_component);

sound/soc/fsl/fsl_easrc.c

···
 	.controls		= fsl_easrc_snd_controls,
 	.num_controls		= ARRAY_SIZE(fsl_easrc_snd_controls),
 	.legacy_dai_naming	= 1,
+#ifdef CONFIG_DEBUG_FS
+	.debugfs_prefix		= "easrc",
+#endif
 };
 
 static const struct reg_default fsl_easrc_reg_defaults[] = {