85xx: Add eSDHC support for 8536 DS

Signed-off-by: Andy Fleming <afleming@freescale.com>
diff --git a/board/freescale/mpc8536ds/mpc8536ds.c b/board/freescale/mpc8536ds/mpc8536ds.c
index bddc78f..31c1e15 100644
--- a/board/freescale/mpc8536ds/mpc8536ds.c
+++ b/board/freescale/mpc8536ds/mpc8536ds.c
@@ -44,6 +44,20 @@
 
 phys_size_t fixed_sdram(void);
 
+int board_early_init_f (void)
+{
+#ifdef CONFIG_MMC
+	volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+
+	setbits_be32(&gur->pmuxcr,
+			(MPC85xx_PMUXCR_SD_DATA |
+			 MPC85xx_PMUXCR_SDHC_CD |
+			 MPC85xx_PMUXCR_SDHC_WP));
+
+#endif
+	return 0;
+}
+
 int checkboard (void)
 {
 	printf ("Board: MPC8536DS, System ID: 0x%02x, "