ASoC: fsl: remove redundant Kconfig dependency on SND_SOC_POWERPC_DMA

Kconfig option SND_SOC_POWERPC_DMA is under menuconfig SND_POWERPC_SOC.
Since SND_POWERPC_SOC already depends on FSL_SOC, there is no need for
SND_SOC_POWERPC_DMA to do the same.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/fsl/Kconfig

@@ -18,7 +18,6 @@ config SND_MPC52xx_DMA
 
 config SND_SOC_POWERPC_DMA
 	tristate
-	depends on FSL_SOC
 
 config SND_SOC_MPC8610_HPCD
 	tristate "ALSA SoC support for the Freescale MPC8610 HPCD board"