mvebu: fix boot script for booting from mmc

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/boot/uboot-mvebu/patches/003-boot_script.patch

@@ -0,0 +1,32 @@
+--- a/include/configs/clearfog.h
++++ b/include/configs/clearfog.h
+@@ -107,7 +107,18 @@
+ /* Keep device tree and initrd in lower memory so the kernel can access them */
+ #define CONFIG_EXTRA_ENV_SETTINGS	\
+ 	"fdt_high=0x10000000\0"		\
+-	"initrd_high=0x10000000\0"
++	"initrd_high=0x10000000\0"	\
++	"script=boot.scr\0"		\
++	"loadaddr=0x01000000\0"		\
++	"mmcdev=0\0"			\
++	"mmcpart=1\0"			\
++	"loadbootscript=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};\0" \
++	"bootscript=echo Running bootscript from mmc ...; source ${loadaddr}\0"
++
++#define CONFIG_BOOTCOMMAND		\
++	"if run loadbootscript; then "	\
++		"run bootscript; "	\
++	"fi"
+ 
+ /* SPL */
+ /*
+--- a/configs/clearfog_defconfig
++++ b/configs/clearfog_defconfig
+@@ -3,6 +3,7 @@ CONFIG_ARCH_MVEBU=y
+ CONFIG_SYS_MALLOC_F_LEN=0x2000
+ CONFIG_TARGET_CLEARFOG=y
+ CONFIG_DEFAULT_DEVICE_TREE="armada-388-clearfog"
++CONFIG_HUSH_PARSER=y
+ CONFIG_SPL=y
+ # CONFIG_CMD_IMLS is not set
+ # CONFIG_CMD_FLASH is not set