ASoC: tegra: Always use the generic dmaengine helper library

The usage of the dmaengine helpers is unconditional, especially when
doing compile testing.
Reported-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

sound/soc/tegra/Kconfig

@@ -2,7 +2,7 @@ config SND_SOC_TEGRA
 	tristate "SoC Audio for the Tegra System-on-Chip"
 	depends on ARCH_TEGRA && TEGRA20_APB_DMA
 	select REGMAP_MMIO
-	select SND_SOC_GENERIC_DMAENGINE_PCM if TEGRA20_APB_DMA
+	select SND_SOC_GENERIC_DMAENGINE_PCM
 	help
 	  Say Y or M here if you want support for SoC audio on Tegra.