sh: Move sh4a dma header from cpu-sh4 to cpu-sh4a.

cpu-sh4a headers take priority over cpu-sh4 ones by virtue of the build
system, there's no need to try and mingle sh4a stuff in cpu-sh4.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/include/cpu-sh4/cpu/dma.h

 #ifndef __ASM_CPU_SH4_DMA_H
 #define __ASM_CPU_SH4_DMA_H
 
-/* SH7751/7760/7780 DMA IRQ sources */
-
-#ifdef CONFIG_CPU_SH4A
-
-#include <cpu/dma-sh4a.h>
-
-#else /* CONFIG_CPU_SH4A */
-
 #include <linux/sh_intc.h>
 
 /*
@@ -21,6 +13,7 @@
 
 #define SH_DMAC_BASE0	0xffa00000
 #define SH_DMAC_BASE1	0xffa00070
+
 /* Definitions for the SuperH DMAC */
 #define TM_BURST	0x00000080
 #define TS_8		0x00000010
@@ -30,6 +23,4 @@
 
 #define DMAOR_COD	0x00000008
 
-#endif
-
 #endif /* __ASM_CPU_SH4_DMA_H */