arm: imx: Switch mx6cuboxi to use config_distro_bootcmd.h.

This allows for more flexible and standardized boot across multiple
platforms.

Remove redundant legacy boot environment.

Cc: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Vagrant Cascadian <vagrant@debian.org>

include/configs/mx6cuboxi.h

@@ -81,23 +81,26 @@
 
 #define CONFIG_MXC_UART_BASE	UART1_BASE
 #define CONFIG_CONSOLE_DEV	"ttymxc0"
-#define CONFIG_MMCROOT		"/dev/mmcblk0p2"
 #define CONFIG_SYS_FSL_USDHC_NUM	1
 #define CONFIG_SYS_MMC_ENV_DEV		0	/* SDHC2 */
 
 #define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
+#ifndef CONFIG_SPL_BUILD
 #define CONFIG_EXTRA_ENV_SETTINGS \
-	"script=boot.scr\0" \
-	"image=zImage\0" \
 	"fdtfile=undefined\0" \
 	"fdt_addr_r=0x18000000\0" \
-	"boot_fdt=try\0" \
+	"fdt_addr=0x18000000\0" \
+	"kernel_addr_r=" __stringify(CONFIG_LOADADDR) "\0"  \
+	"pxefile_addr_r=" __stringify(CONFIG_LOADADDR) "\0" \
+	"scriptaddr=" __stringify(CONFIG_LOADADDR) "\0" \
+	"ramdisk_addr_r=0x13000000\0" \
+	"ramdiskaddr=0x13000000\0" \
+	"initrd_high=0xffffffff\0" \
+	"fdt_high=0xffffffff\0" \
 	"ip_dyn=yes\0" \
 	"console=" CONFIG_CONSOLE_DEV "\0" \
 	"bootm_size=0x10000000\0" \
 	"mmcdev=" __stringify(CONFIG_SYS_MMC_ENV_DEV) "\0" \
-	"mmcpart=1\0" \
-	"mmcroot=" CONFIG_MMCROOT " rootwait rw\0" \
 	"update_sd_firmware=" \
 		"if test ${ip_dyn} = yes; then " \
 			"setenv get_cmd dhcp; " \
@@ -111,53 +114,6 @@
 				"mmc write ${loadaddr} 0x2 ${fw_sz}; " \
 			"fi; "	\
 		"fi\0" \
-	"mmcargs=setenv bootargs console=${console},${baudrate} " \
-		"root=${mmcroot}\0" \
-	"loadbootscript=" \
-		"fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};\0" \
-	"bootscript=echo Running bootscript from mmc ...; " \
-		"source\0" \
-	"loadimage=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${image}\0" \
-	"loadfdt=fatload mmc ${mmcdev}:${mmcpart} ${fdt_addr_r} ${fdtfile}\0" \
-	"mmcboot=echo Booting from mmc ...; " \
-		"run mmcargs; " \
-		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
-			"if run loadfdt; then " \
-				"bootz ${loadaddr} - ${fdt_addr_r}; " \
-			"else " \
-				"if test ${boot_fdt} = try; then " \
-					"bootz; " \
-				"else " \
-					"echo WARN: Cannot load the DT; " \
-				"fi; " \
-			"fi; " \
-		"else " \
-			"bootz; " \
-		"fi;\0" \
-	"netargs=setenv bootargs console=${console},${baudrate} " \
-		"root=/dev/nfs " \
-		"ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0" \
-	"netboot=echo Booting from net ...; " \
-		"run netargs; " \
-		"if test ${ip_dyn} = yes; then " \
-			"setenv get_cmd dhcp; " \
-		"else " \
-			"setenv get_cmd tftp; " \
-		"fi; " \
-		"${get_cmd} ${image}; " \
-		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
-			"if ${get_cmd} ${fdt_addr_r} ${fdtfile}; then " \
-				"bootz ${loadaddr} - ${fdt_addr_r}; " \
-			"else " \
-				"if test ${boot_fdt} = try; then " \
-					"bootz; " \
-				"else " \
-					"echo WARN: Cannot load the DT; " \
-				"fi; " \
-			"fi; " \
-		"else " \
-			"bootz; " \
-		"fi;\0" \
 	"findfdt="\
 		"if test $board_name = HUMMINGBOARD && test $board_rev = MX6Q ; then " \
 			"setenv fdtfile imx6q-hummingboard.dtb; fi; " \
@@ -169,20 +125,24 @@
 			"setenv fdtfile imx6dl-cubox-i.dtb; fi; " \
 		"if test $fdtfile = undefined; then " \
 			"echo WARNING: Could not determine dtb to use; fi; \0" \
+	BOOTENV
 
 #define CONFIG_BOOTCOMMAND \
 	"run findfdt; " \
-	"mmc dev ${mmcdev};" \
-	"if mmc rescan; then " \
-		"if run loadbootscript; then " \
-		"run bootscript; " \
-		"else " \
-			"if run loadimage; then " \
-				"run mmcboot; " \
-			"else run netboot; " \
-			"fi; " \
-		"fi; " \
-	"else run netboot; fi"
+	"run distro_bootcmd"
+
+#define BOOT_TARGET_DEVICES(func) \
+	func(MMC, mmc, 0) \
+	func(USB, usb, 0) \
+	func(PXE, pxe, na) \
+	func(DHCP, dhcp, na)
+
+#include <config_distro_defaults.h>
+#include <config_distro_bootcmd.h>
+
+#else
+#define CONFIG_EXTRA_ENV_SETTINGS
+#endif /* CONFIG_SPL_BUILD */
 
 /* Physical Memory Map */
 #define CONFIG_NR_DRAM_BANKS           1