ASoC: Intel: fix Kconfig dependencies

I ran into multiple problems during randconfig builds of the
recently changed Kconfig logic for Intel ASoC drivers:

- Building without DMADEVICES doesn't work in general
- With that dependency added, we can relax the 'depends
  on X86' again and allow compile-testing, except for
  SND_SST_ATOM_HIFI2_PLATFORM, which depends on X86
  for asm/platform_sst_audio.h
- Skylake requires SND_SOC_INTEL_SST_ACPI, so we
  have to depend on ACPI in turn
- Haswell needs SND_DMA_SGBUF for snd_sgbuf_aligned_pages()

With the new set of dependencies, I no longer get any build
failures.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/Kconfig

@@ -31,13 +31,14 @@ config SND_SOC_ACPI_INTEL_MATCH
 
 config SND_SOC_INTEL_SST_TOPLEVEL
 	tristate "Intel ASoC SST drivers"
-	depends on X86
+	depends on X86 || COMPILE_TEST
+	depends on DMADEVICES
 	select SND_SOC_INTEL_MACH
 	select SND_SOC_INTEL_COMMON
 
 config SND_SOC_INTEL_HASWELL
 	tristate "Intel ASoC SST driver for Haswell/Broadwell"
-	depends on SND_SOC_INTEL_SST_TOPLEVEL
+	depends on SND_SOC_INTEL_SST_TOPLEVEL && SND_DMA_SGBUF
 	select SND_SOC_INTEL_SST
 	select SND_SOC_INTEL_SST_FIRMWARE
 
@@ -49,12 +50,12 @@ config SND_SOC_INTEL_BAYTRAIL
 
 config SND_SST_ATOM_HIFI2_PLATFORM
 	tristate "Intel ASoC SST driver for HiFi2 platforms (*field, *trail)"
-	depends on SND_SOC_INTEL_SST_TOPLEVEL
+	depends on SND_SOC_INTEL_SST_TOPLEVEL && X86
 	select SND_SOC_COMPRESS
 
 config SND_SOC_INTEL_SKYLAKE
 	tristate "Intel ASoC SST driver for SKL/BXT/KBL/GLK/CNL"
-	depends on SND_SOC_INTEL_SST_TOPLEVEL
+	depends on SND_SOC_INTEL_SST_TOPLEVEL && PCI && ACPI
 	select SND_HDA_EXT_CORE
 	select SND_HDA_DSP_LOADER
 	select SND_SOC_TOPOLOGY