Revert "drivers/dma: linux/module.h included twice"

This reverts commit 865d9438eb1f7670d2e88849f059db551b320887.

The module.h incsuion twice has been updated tree wide hence this is not
required to be merged.

Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index 85b3d3c..c32103f 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -26,6 +26,7 @@
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/dmaengine.h>
+#include <linux/module.h>
 
 #include <asm/irq.h>
 #include <mach/dma-v1.h>