mx5: set CONSISTENT_DMA_SIZE to 128M for mx5

Signed-off-by: Jason Chen <b02280@freescale.com>
diff --git a/arch/arm/mach-mx5/mm.c b/arch/arm/mach-mx5/mm.c
index 4a7c3d6..eb69736 100644
--- a/arch/arm/mach-mx5/mm.c
+++ b/arch/arm/mach-mx5/mm.c
@@ -13,6 +13,7 @@
 
 #include <linux/mm.h>
 #include <linux/init.h>
+#include <linux/dma-mapping.h>
 
 #include <asm/mach/map.h>
 
@@ -70,6 +71,7 @@
 	mxc_set_cpu_type(MXC_CPU_MX53);
 	mxc_iomux_v3_init(MX53_IO_ADDRESS(MX53_IOMUXC_BASE_ADDR));
 	mxc_arch_reset_init(MX53_IO_ADDRESS(MX53_WDOG1_BASE_ADDR));
+	init_consistent_dma_size(SZ_128M);
 }
 
 void __init mx51_init_irq(void)