powerpc: Make dma_addr_t a u64 if CONFIG_PHYS_64BIT is set

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/include/asm/types.h

@@ -55,7 +55,7 @@ typedef u64 phys_addr_t;
 typedef u32 phys_addr_t;
 #endif
 
-#ifdef __powerpc64__
+#if defined(__powerpc64__) || defined(CONFIG_PHYS_64BIT)
 typedef u64 dma_addr_t;
 #else
 typedef u32 dma_addr_t;