ASoC: SOF: Intel: use def_tristate, avoid using select

So far we used select to use the relevant built-in/module options, but
this led to blurring layers between core and Intel Kconfigs.

Use def_tristate works just as well and removes Intel stuff from the code.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191101173045.27099-7-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/Kconfig

@@ -14,7 +14,6 @@ config SND_SOC_SOF_PCI
 	depends on PCI
 	select SND_SOC_SOF
 	select SND_SOC_ACPI if ACPI
-	select SND_SOC_SOF_INTEL_PCI if SND_SOC_SOF_INTEL_TOPLEVEL
 	help
 	  This adds support for PCI enumeration. This option is
 	  required to enable Intel Skylake+ devices
@@ -26,7 +25,6 @@ config SND_SOC_SOF_ACPI
 	depends on ACPI || COMPILE_TEST
 	select SND_SOC_SOF
 	select SND_SOC_ACPI if ACPI
-	select SND_SOC_SOF_INTEL_ACPI if SND_SOC_SOF_INTEL_TOPLEVEL
 	select IOSF_MBI if X86 && PCI
 	help
 	  This adds support for ACPI enumeration. This option is required

sound/soc/sof/intel/Kconfig

@@ -10,7 +10,7 @@ config SND_SOC_SOF_INTEL_TOPLEVEL
 if SND_SOC_SOF_INTEL_TOPLEVEL
 
 config SND_SOC_SOF_INTEL_ACPI
-	tristate
+	def_tristate SND_SOC_SOF_ACPI
 	select SND_SOC_SOF_BAYTRAIL  if SND_SOC_SOF_BAYTRAIL_SUPPORT
 	select SND_SOC_SOF_BROADWELL if SND_SOC_SOF_BROADWELL_SUPPORT
 	help
@@ -18,7 +18,7 @@ config SND_SOC_SOF_INTEL_ACPI
 	  'select' statements at a higher level
 
 config SND_SOC_SOF_INTEL_PCI
-	tristate
+	def_tristate SND_SOC_SOF_PCI
 	select SND_SOC_SOF_MERRIFIELD  if SND_SOC_SOF_MERRIFIELD_SUPPORT
 	select SND_SOC_SOF_APOLLOLAKE  if SND_SOC_SOF_APOLLOLAKE_SUPPORT
 	select SND_SOC_SOF_GEMINILAKE  if SND_SOC_SOF_GEMINILAKE_SUPPORT