ARM: ARM_DMA_ZONE_SIZE is no more

One less dependency on mach/memory.h.

Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h
index fcf15de..628670e 100644
--- a/arch/arm/include/asm/dma.h
+++ b/arch/arm/include/asm/dma.h
@@ -1,8 +1,6 @@
 #ifndef __ASM_ARM_DMA_H
 #define __ASM_ARM_DMA_H
 
-#include <asm/memory.h>
-
 /*
  * This is the maximum virtual address which can be DMA'd from.
  */
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 4a8a01e..90a38c6 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -28,7 +28,6 @@
 #include <asm/sizes.h>
 #include <asm/tlb.h>
 #include <asm/fixmap.h>
-#include <asm/memory.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -214,11 +213,7 @@
 
 #ifdef CONFIG_ZONE_DMA
 
-#ifdef ARM_DMA_ZONE_SIZE
-unsigned long arm_dma_zone_size = ARM_DMA_ZONE_SIZE;
-#else
 unsigned long arm_dma_zone_size __read_mostly;
-#endif
 EXPORT_SYMBOL(arm_dma_zone_size);
 
 /*