Driver/DDR: combine ccsr_ddr for 83xx, 85xx and 86xx

Fix ccsr_ddr structure to avoid using typedef. Combine DDR2 and DDR3
structure for 83xx, 85xx and 86xx.

Signed-off-by: York Sun <yorksun@freescale.com>
diff --git a/board/freescale/p1010rdb/spl_minimal.c b/board/freescale/p1010rdb/spl_minimal.c
index aa2a344..39a5a0f 100644
--- a/board/freescale/p1010rdb/spl_minimal.c
+++ b/board/freescale/p1010rdb/spl_minimal.c
@@ -19,7 +19,8 @@
 
 void sdram_init(void)
 {
-	ccsr_ddr_t *ddr = (ccsr_ddr_t *)CONFIG_SYS_FSL_DDR_ADDR;
+	struct ccsr_ddr __iomem *ddr =
+		(struct ccsr_ddr __iomem *)CONFIG_SYS_FSL_DDR_ADDR;
 	ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
 	u32 ddr_ratio;
 	unsigned long ddr_freq_mhz;