pico-imx6ul: Add function to create gpt partitions

Command run setup_emmc will create gpt partitions for mmc 0 device
based on patitions variable.

Signed-off-by: Fabio Berton <fabio.berton@ossystems.com.br>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

configs/pico-imx6ul_defconfig

@@ -12,6 +12,7 @@ CONFIG_CMD_MEMTEST=y
 CONFIG_CMD_DFU=y
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_GPIO=y
+CONFIG_CMD_GPT=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_PART=y
 CONFIG_CMD_USB=y

include/configs/pico-imx6ul.h

@@ -71,6 +71,7 @@
 	"partitions=" \
 		"uuid_disk=${uuid_gpt_disk};" \
 		"name=boot,size=16MiB;name=rootfs,size=0,uuid=${uuid_gpt_rootfs}\0" \
+	"setup_emmc=gpt write mmc 0 $partitions; reset;\0" \
 	"mmcargs=setenv bootargs console=${console},${baudrate} " \
 		"root=PARTUUID=${uuid} rootwait rw\0" \
 	"loadimage=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${image}\0" \