imx: imx8m{m,n,p}_venice: migrate to CONFIG_EXTRA_ENV_TEXT

Move the majority of the environment from the board headers to
a separate text file.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/include/configs/imx8mp_venice.h b/include/configs/imx8mp_venice.h
index 71962c5..6b87f0d 100644
--- a/include/configs/imx8mp_venice.h
+++ b/include/configs/imx8mp_venice.h
@@ -13,13 +13,6 @@
 #define CONFIG_SYS_UBOOT_BASE	\
 	(QSPI0_AMBA_BASE + CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR * 512)
 
-#define MEM_LAYOUT_ENV_SETTINGS \
-	"kernel_addr_r=" __stringify(CONFIG_SYS_LOAD_ADDR) "\0" \
-	"fdt_addr_r=0x50200000\0" \
-	"scriptaddr=0x50280000\0" \
-	"ramdisk_addr_r=0x50300000\0" \
-	"kernel_comp_addr_r=0x40200000\0"
-
 /* Enable Distro Boot */
 #define BOOT_TARGET_DEVICES(func) \
 	func(MMC, mmc, 1) \
@@ -27,45 +20,9 @@
 	func(USB, usb, 0) \
 	func(DHCP, dhcp, na)
 #include <config_distro_bootcmd.h>
-
-/* Initial environment variables */
 #define CONFIG_EXTRA_ENV_SETTINGS \
-	BOOTENV \
-	MEM_LAYOUT_ENV_SETTINGS \
-	"script=boot.scr\0" \
-	"bootm_size=0x10000000\0" \
-	"dev=2\0" \
-	"preboot=gsc wd-disable\0" \
-	"console=ttymxc1,115200\0" \
-	"update_firmware=" \
-		"tftpboot $loadaddr $image && " \
-		"setexpr blkcnt $filesize + 0x1ff && " \
-		"setexpr blkcnt $blkcnt / 0x200 && " \
-		"mmc dev $dev && " \
-		"mmc write $loadaddr 0x40 $blkcnt\0" \
-	"loadfdt=" \
-		"if $fsload $fdt_addr_r $dir/$fdt_file1; " \
-			"then echo loaded $fdt_file1; " \
-		"elif $fsload $fdt_addr_r $dir/$fdt_file2; " \
-			"then echo loaded $fdt_file2; " \
-		"elif $fsload $fdt_addr_r $dir/$fdt_file3; " \
-			"then echo loaded $fdt_file3; " \
-		"elif $fsload $fdt_addr_r $dir/$fdt_file4; " \
-			"then echo loaded $fdt_file4; " \
-		"elif $fsload $fdt_addr_r $dir/$fdt_file5; " \
-			"then echo loaded $fdt_file5; " \
-		"fi\0" \
-	"boot_net=" \
-		"setenv fsload tftpboot; " \
-		"run loadfdt && tftpboot $kernel_addr_r $dir/Image && " \
-		"booti $kernel_addr_r - $fdt_addr_r\0" \
-	"update_rootfs=" \
-		"tftpboot $loadaddr $image && " \
-		"gzwrite mmc $dev $loadaddr $filesize 100000 1000000\0" \
-	"update_all=" \
-		"tftpboot $loadaddr $image && " \
-		"gzwrite mmc $dev $loadaddr $filesize\0" \
-	"erase_env=mmc dev $dev; mmc erase 0x7f08 0x40\0"
+	"splblk=0x40\0" \
+	BOOTENV
 
 #define CONFIG_SYS_INIT_RAM_ADDR        0x40000000
 #define CONFIG_SYS_INIT_RAM_SIZE        SZ_2M