pico-imx6ul: Convert to distro config

Instead of keeping a custom environment, use a more generic approach
by switching to distro config.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
diff --git a/configs/pico-imx6ul_defconfig b/configs/pico-imx6ul_defconfig
index 59ef7b7..3f969a2 100644
--- a/configs/pico-imx6ul_defconfig
+++ b/configs/pico-imx6ul_defconfig
@@ -4,7 +4,9 @@
 CONFIG_TARGET_PICO_IMX6UL=y
 # CONFIG_CMD_BMODE is not set
 CONFIG_NR_DRAM_BANKS=1
+CONFIG_DISTRO_DEFAULTS=y
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/technexion/pico-imx6ul/imximage.cfg"
+CONFIG_BOOTCOMMAND="run finduuid; run distro_bootcmd"
 CONFIG_BOOTDELAY=3
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_DEFAULT_FDT_FILE="imx6ul-pico-hobbit.dtb"