Tegra: Medcom-Wide: Enable NAND and boot script support

Boot script support brings Medcom-Wide in line with other Tegra boards.
In order to enable booting a Linux kernel with initial ramdisk, also add
support for the new FIT image type.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>

include/configs/medcom-wide.h

@@ -44,14 +44,21 @@
 #define CONFIG_BOARD_EARLY_INIT_F
 #define CONFIG_BOARD_LATE_INIT
 
-#define CONFIG_ENV_IS_NOWHERE
-
 /* SD/MMC */
 #define CONFIG_MMC
 #define CONFIG_GENERIC_MMC
 #define CONFIG_TEGRA_MMC
 #define CONFIG_CMD_MMC
 
+/* NAND support */
+#define CONFIG_CMD_NAND
+#define CONFIG_TEGRA_NAND
+#define CONFIG_SYS_MAX_NAND_DEVICE	1
+
+/* Environment in NAND, aligned to start of last sector */
+#define CONFIG_ENV_IS_IN_NAND
+#define CONFIG_ENV_OFFSET		(SZ_512M - SZ_128K) /* 128K sectors */
+
 /* USB host support */
 #define CONFIG_USB_EHCI
 #define CONFIG_USB_EHCI_TEGRA
@@ -66,13 +73,6 @@
 #define CONFIG_CMD_NET
 #define CONFIG_CMD_DHCP
 
-#define CONFIG_FIT
-
-#define CONFIG_BOOTCOMMAND				\
-	"mmc rescan;"					\
-	"ext2load mmc 0 0x17000000 /boot/uImage;"	\
-	"bootm"
-
 /* LCD support */
 #define CONFIG_LCD
 #define CONFIG_PWM_TEGRA
@@ -80,6 +80,9 @@
 #define LCD_BPP LCD_COLOR16
 #define CONFIG_SYS_WHITE_ON_BLACK
 
+/* support the new (FDT-based) image format */
+#define CONFIG_FIT
+
 #include "tegra-common-post.h"
 
 #endif /* __CONFIG_H */