Fix mpc85xx ddr-gen3 ddr_sdram_cfg.

Commit e1be0d25, "32bit BUg fix for DDR2 on 8572" prevented other
sdram_cfg bits (such as ecc and self_refresh_in_sleep) from being set.

Signed-off-by: Ed Swarthout <Ed.Swarthout@freescale.com>
diff --git a/cpu/mpc85xx/ddr-gen3.c b/cpu/mpc85xx/ddr-gen3.c
index 8dc2b3a..99c325a 100644
--- a/cpu/mpc85xx/ddr-gen3.c
+++ b/cpu/mpc85xx/ddr-gen3.c
@@ -79,8 +79,8 @@
 	out_be32(&ddr->ddr_sdram_rcw_1, regs->ddr_sdram_rcw_1);
 	out_be32(&ddr->ddr_sdram_rcw_2, regs->ddr_sdram_rcw_2);
 
-	/* Do not enable the memory */
-	temp_sdram_cfg = in_be32(&ddr->sdram_cfg);
+	/* Set, but do not enable the memory */
+	temp_sdram_cfg = regs->ddr_sdram_cfg;
 	temp_sdram_cfg &= ~(SDRAM_CFG_MEM_EN);
 	out_be32(&ddr->sdram_cfg, temp_sdram_cfg);
 	/*