[ARM] Ensure that both MAX_DMA_ADDRESS and ISA_DMA_THRESHOLD are defined

Both of these symbols should be defined by a platform, or neither
should be defined.  Ensure that all platforms conform.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-davinci/include/mach/memory.h

@@ -52,6 +52,7 @@ __arch_adjust_zones(int node, unsigned long *size, unsigned long *holes)
         if ((meminfo.bank[0].size >> 20) > 128) __arch_adjust_zones(node, zone_size, holes)
 
 #define ISA_DMA_THRESHOLD	(PHYS_OFFSET + (128<<20) - 1)
+#define MAX_DMA_ADDRESS		(PAGE_OFFSET + (128<<20))
 
 #endif
 

arch/arm/mach-h720x/include/mach/memory.h

@@ -12,10 +12,8 @@
  * This is the maximum DMA address that can be DMAd to.
  * There should not be more than (0xd0000000 - 0xc0000000)
  * bytes of RAM.
- *
- * If you set this, you must also set ISA_DMA_THRESHOLD and setup a DMA
- * zone if this does not cover all possible RAM.
  */
+#define ISA_DMA_THRESHOLD	(PHYS_OFFSET + SZ_256M - 1)
 #define MAX_DMA_ADDRESS		(PAGE_OFFSET + SZ_256M)
 
 #endif

arch/arm/mach-pxa/include/mach/memory.h

@@ -37,6 +37,7 @@ void cmx2xx_pci_adjust_zones(int node, unsigned long *size,
 	cmx2xx_pci_adjust_zones(node, size, holes)
 
 #define ISA_DMA_THRESHOLD	(PHYS_OFFSET + SZ_64M - 1)
+#define MAX_DMA_ADDRESS		(PAGE_OFFSET + SZ_64M)
 #endif
 
 #endif

arch/arm/mach-sa1100/include/mach/memory.h

@@ -23,6 +23,7 @@ void sa1111_adjust_zones(int node, unsigned long *size, unsigned long *holes);
 	sa1111_adjust_zones(node, size, holes)
 
 #define ISA_DMA_THRESHOLD	(PHYS_OFFSET + SZ_1M - 1)
+#define MAX_DMA_ADDRESS		(PAGE_OFFSET + SZ_1M)
 
 #endif
 #endif