[ARM] pxa: explicit #include <mach/dma.h> in various drivers

Where 'pxa_dma_desc' and 'pxa_{request,free}_dma' are referenced.

Signed-off-by: Eric Miao <eric.miao@marvell.com>

sound/arm/pxa2xx-pcm.h

@@ -9,7 +9,7 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#include <asm/dma.h>
+#include <mach/dma.h>
 
 struct pxa2xx_runtime_data {
 	int dma_ch;