fsl_dma: Break out common memory initialization function

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

include/asm-ppc/fsl_dma.h

@@ -97,6 +97,9 @@ typedef struct fsl_dma {
 #ifdef CONFIG_FSL_DMA
 void dma_init(void);
 int dmacpy(phys_addr_t dest, phys_addr_t src, phys_size_t n);
+#if (defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER))
+void dma_meminit(uint val, uint size);
+#endif
 #endif
 
 #endif	/* _ASM_DMA_H_ */