ASoC: Intel: tag byt-rt5640 machine driver as deprecated

All the functionality was merged in DPCM-based driver,
keep older driver to avoid breaking userspace but
tag it as unsupported/deprecated

Signed-off-by: Pierre-Louis Bossart <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/intel/Kconfig

···
 config SND_SOC_INTEL_BYT_RT5640_MACH
 	tristate "ASoC Audio driver for Intel Baytrail with RT5640 codec"
 	depends on X86_INTEL_LPSS && I2C
-	depends on DW_DMAC_CORE=y
+	depends on DW_DMAC_CORE=y && (SND_SOC_INTEL_BYTCR_RT5640_MACH = n)
 	select SND_SOC_INTEL_SST
 	select SND_SOC_INTEL_BAYTRAIL
 	select SND_SOC_RT5640
 	help
 	  This adds audio driver for Intel Baytrail platform based boards
-	  with the RT5640 audio codec.
+	  with the RT5640 audio codec. This driver is deprecated, use
+	  SND_SOC_INTEL_BYTCR_RT5640_MACH instead for better functionality
 
 config SND_SOC_INTEL_BYT_MAX98090_MACH
 	tristate "ASoC Audio driver for Intel Baytrail with MAX98090 codec"
···
 	  If unsure select "N".
 
 config SND_SOC_INTEL_BYTCR_RT5640_MACH
-	tristate "ASoC Audio DSP Support for MID BYT Platform"
+        tristate "ASoC Audio driver for Intel Baytrail and Baytrail-CR with RT5640 codec"
 	depends on X86 && I2C
 	select SND_SOC_RT5640
 	select SND_SST_MFLD_PLATFORM
 	select SND_SST_IPC_ACPI
 	help
-	  This adds support for ASoC machine driver for Intel(R) MID Baytrail platform
-          used as alsa device in audio substem in Intel(R) MID devices
+          This adds support for ASoC machine driver for Intel(R) Baytrail and Baytrail-CR
+          platforms with RT5640 audio codec.
           Say Y if you have such a device
           If unsure select "N".