Add CFG_MPC86xx_DDR_ADDR and CFG_MPC86xx_DDR2_ADDR symbols

These replace direct structure references for IMMR sections.

Signed-off-by: Jon Loeliger <jdl@freescale.com>

include/asm-ppc/immap_86xx.h

@@ -1330,4 +1330,9 @@ typedef struct immap {
 
 extern immap_t  *immr;
 
+#define CFG_MPC86xx_DDR_OFFSET	(0x2000)
+#define CFG_MPC86xx_DDR_ADDR	(CFG_IMMR + CFG_MPC86xx_DDR_OFFSET)
+#define CFG_MPC86xx_DDR2_OFFSET	(0x6000)
+#define CFG_MPC86xx_DDR2_ADDR	(CFG_IMMR + CFG_MPC86xx_DDR2_OFFSET)
+
 #endif /*__IMMAP_86xx__*/