fsl_esdhc: Fix esdhc disabled problem on some platforms

Some new platform's esdhc pins don't share with other function.
The eSDHC shouldn't be disabled, even if "esdhc" isn't defined
in hwconfig env variable.

Use CONFIG_FSL_ESDHC_PIN_MUX to fix this problem.

Signed-off-by: Chenhui Zhao <b26998@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index 40b136c..cef2859 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -508,17 +508,19 @@
 void fdt_fixup_esdhc(void *blob, bd_t *bd)
 {
 	const char *compat = "fsl,esdhc";
-	const char *status = "okay";
 
+#ifdef CONFIG_FSL_ESDHC_PIN_MUX
 	if (!hwconfig("esdhc")) {
-		status = "disabled";
-		goto out;
+		do_fixup_by_compat(blob, compat, "status", "disabled",
+				8 + 1, 1);
+		return;
 	}
+#endif
 
 	do_fixup_by_compat_u32(blob, compat, "clock-frequency",
 			       gd->sdhc_clk, 1);
-out:
-	do_fixup_by_compat(blob, compat, "status", status,
-			   strlen(status) + 1, 1);
+
+	do_fixup_by_compat(blob, compat, "status", "okay",
+			   4 + 1, 1);
 }
 #endif
diff --git a/include/configs/MPC837XEMDS.h b/include/configs/MPC837XEMDS.h
index c237991..abccfd6 100644
--- a/include/configs/MPC837XEMDS.h
+++ b/include/configs/MPC837XEMDS.h
@@ -509,6 +509,7 @@
 
 #ifdef CONFIG_MMC
 #define CONFIG_FSL_ESDHC
+#define CONFIG_FSL_ESDHC_PIN_MUX
 #define CONFIG_SYS_FSL_ESDHC_ADDR	CONFIG_SYS_MPC83xx_ESDHC_ADDR
 #define CONFIG_CMD_MMC
 #define CONFIG_GENERIC_MMC
diff --git a/include/configs/MPC837XERDB.h b/include/configs/MPC837XERDB.h
index 385c7c3..ea3056b 100644
--- a/include/configs/MPC837XERDB.h
+++ b/include/configs/MPC837XERDB.h
@@ -517,6 +517,7 @@
 
 #ifdef CONFIG_MMC
 #define CONFIG_FSL_ESDHC
+#define CONFIG_FSL_ESDHC_PIN_MUX
 #define CONFIG_SYS_FSL_ESDHC_ADDR	CONFIG_SYS_MPC83xx_ESDHC_ADDR
 #define CONFIG_CMD_MMC
 #define CONFIG_GENERIC_MMC
diff --git a/include/configs/MPC8569MDS.h b/include/configs/MPC8569MDS.h
index 2395cb2..177d5d5 100644
--- a/include/configs/MPC8569MDS.h
+++ b/include/configs/MPC8569MDS.h
@@ -554,6 +554,7 @@
 
 #ifdef CONFIG_MMC
 #define CONFIG_FSL_ESDHC
+#define CONFIG_FSL_ESDHC_PIN_MUX
 #define CONFIG_SYS_FSL_ESDHC_ADDR	CONFIG_SYS_MPC85xx_ESDHC_ADDR
 #define CONFIG_CMD_MMC
 #define CONFIG_GENERIC_MMC