ASoC: Intel: Add dependency to DW_DMAC for BDW platform

Add dependency to DW_DMAC for broadwell machine, which
have built in DW dma engines.
Signed-off-by: NJie Yang <yang.jie@intel.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

sound/soc/intel/Kconfig

@@ -61,7 +61,7 @@ config SND_SOC_INTEL_BYT_MAX98090_MACH
 
 config SND_SOC_INTEL_BROADWELL_MACH
 	tristate "ASoC Audio DSP support for Intel Broadwell Wildcatpoint"
-	depends on SND_SOC_INTEL_SST && X86_INTEL_LPSS
+	depends on SND_SOC_INTEL_SST && X86_INTEL_LPSS && DW_DMAC
 	select SND_SOC_INTEL_HASWELL
 	select SND_COMPRESS_OFFLOAD
 	select SND_SOC_RT286