[U-Boot] [PATCH] mx6qsabresd: Fix booting the kernel from SDHC3

[Fabio Estevam]

commit 49ea0ff5 (mx6qsabresd: use on-board eMMC to store environment) broke 
booting a uImage from SDHC3.

Adapt the default environment to use CONFIG_SYS_MMC_ENV_DEV as the correct mmc
node for loading the kernel, since mmcdev should not be harcoded to zero.

While at it, go back to using SDHC3 as default mmc, since we have Yocto images
that generate an SD card containing U-boot,kernel and rootfs, so it is more 
convenient to keep using SDHC3 as it was originally.

Signed-off-by: Fabio Estevam <fabio.estevam at freescale.com>
---
 include/configs/mx6qsabre_common.h |    2 +-
 include/configs/mx6qsabresd.h      |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/configs/mx6qsabre_common.h b/include/configs/mx6qsabre_common.h
index bd2fb10..5d03b3d 100644
--- a/include/configs/mx6qsabre_common.h
+++ b/include/configs/mx6qsabre_common.h
@@ -86,7 +86,7 @@
 	"console=" CONFIG_CONSOLE_DEV "\0" \
 	"fdt_high=0xffffffff\0"	  \
 	"initrd_high=0xffffffff\0" \
-	"mmcdev=0\0" \
+	"mmcdev=CONFIG_SYS_MMC_ENV_DEV\0" \
 	"mmcpart=1\0" \
 	"mmcroot=" CONFIG_MMCROOT " rootwait rw\0" \
 	"mmcargs=setenv bootargs console=${console},${baudrate} " \
diff --git a/include/configs/mx6qsabresd.h b/include/configs/mx6qsabresd.h
index a1d9285..ccb7751 100644
--- a/include/configs/mx6qsabresd.h
+++ b/include/configs/mx6qsabresd.h
@@ -27,7 +27,7 @@
 
 #define CONFIG_SYS_FSL_USDHC_NUM	3
 #if defined(CONFIG_ENV_IS_IN_MMC)
-#define CONFIG_SYS_MMC_ENV_DEV		2	/* eMMC/uSDHC4 */
+#define CONFIG_SYS_MMC_ENV_DEV		1	/* SDHC3 */
 #define CONFIG_SYS_MMC_ENV_PART		1	/* Boot partition 1 */
 #endif
 
-- 
1.7.9.5