mx53ard: Move to booting zImage

Move to booting a zImage kernel by default to align with the other
i.MX boards.

While at it, adjust the fdt_addr so that we can boot a standard
mainline kernel.
Signed-off-by: NFabio Estevam <fabio.estevam@nxp.com>

include/configs/mx53ard.h

@@ -31,6 +31,8 @@
 #define CONFIG_BOARD_EARLY_INIT_F
 #define CONFIG_MXC_GPIO
 
+#define CONFIG_CMD_BOOTZ
+
 #define CONFIG_SYS_MAX_NAND_DEVICE	1
 #define CONFIG_SYS_NAND_BASE		NFC_BASE_ADDR_AXI
 #define CONFIG_NAND_MXC
@@ -93,12 +95,12 @@
 
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"script=boot.scr\0" \
-	"uimage=uImage\0" \
+	"uimage=zImage\0" \
 	"console=ttymxc0\0" \
 	"fdt_high=0xffffffff\0" \
 	"initrd_high=0xffffffff\0" \
 	"fdt_file=" CONFIG_DEFAULT_FDT_FILE "\0" \
-	"fdt_addr=0x71000000\0" \
+	"fdt_addr=0x78000000\0" \
 	"boot_fdt=try\0" \
 	"ip_dyn=yes\0" \
 	"mmcdev=" __stringify(CONFIG_SYS_MMC_ENV_DEV) "\0" \
@@ -130,16 +132,16 @@
 		"run mmcargs; " \
 		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
 			"if run loadfdt; then " \
-				"bootm ${loadaddr} - ${fdt_addr}; " \
+				"bootz ${loadaddr} - ${fdt_addr}; " \
 			"else " \
 				"if test ${boot_fdt} = try; then " \
-					"bootm; " \
+					"bootz; " \
 				"else " \
 					"echo WARN: Cannot load the DT; " \
 				"fi; " \
 			"fi; " \
 		"else " \
-			"bootm; " \
+			"bootz; " \
 		"fi;\0" \
 	"netargs=setenv bootargs console=${console},${baudrate} " \
 		"root=/dev/nfs " \
@@ -154,16 +156,16 @@
 		"${get_cmd} ${uimage}; " \
 		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
 			"if ${get_cmd} ${fdt_addr} ${fdt_file}; then " \
-				"bootm ${loadaddr} - ${fdt_addr}; " \
+				"bootz ${loadaddr} - ${fdt_addr}; " \
 			"else " \
 				"if test ${boot_fdt} = try; then " \
-					"bootm; " \
+					"bootz; " \
 				"else " \
 					"echo WARN: Cannot load the DT; " \
 				"fi; " \
 			"fi; " \
 		"else " \
-			"bootm; " \
+			"bootz; " \
 		"fi;\0"
 
 #define CONFIG_BOOTCOMMAND \