pico-imx6ul, pico-imx7d: Use eMMC user partition by default

After discussing with TechNexion about how its default setting, it is
better to install on the eMMC user partition by default, when using
DFU, so it works out of box for majority of users.

Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
diff --git a/include/configs/pico-imx6ul.h b/include/configs/pico-imx6ul.h
index 3d93205..0fea2d6 100644
--- a/include/configs/pico-imx6ul.h
+++ b/include/configs/pico-imx6ul.h
@@ -56,8 +56,8 @@
 
 #define CONFIG_DFU_ENV_SETTINGS \
 	"dfu_alt_info=" \
-		"spl raw 0x2 0x400 mmcpart 1;" \
-		"u-boot raw 0x8a 0x400 mmcpart 1;" \
+		"spl raw 0x2 0x400;" \
+		"u-boot raw 0x8a 0x400;" \
 		"/boot/zImage ext4 0 1;" \
 		"/boot/imx6ul-pico-hobbit.dtb ext4 0 1;" \
 		"/boot/imx6ul-pico-pi.dtb ext4 0 1;" \