ASoC: atmel-pcm: remove unnecessary include

Since commit 95e0e07e ("ASoC: atmel-pcm: use generic dmaengine
framework"), the driver is using dmaengine and is not using any definition
from include/linux/platform_data/dma-atmel.h, stop including it.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20200930145330.3043528-1-alexandre.belloni@bootlin.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/atmel/atmel-pcm-dma.c

@@ -18,7 +18,6 @@
 #include <linux/dma-mapping.h>
 #include <linux/dmaengine.h>
 #include <linux/atmel-ssc.h>
-#include <linux/platform_data/dma-atmel.h>
 
 #include <sound/core.h>
 #include <sound/pcm.h>