imx8mn_ddr4_evk: Allow booting the kernel by default

Currently it is not possible to boot Linux from the SD card
by default.

Make the necessary adjustments to allow it.

Reported-by: Peter Bergin <peter@berginkonsult.se>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Tested-by: Andrey Zhizhikin <andrey.z@gmail.com> # imx8mn_ddr4_evk
Reviewed-by: Peng Fan <peng.fan@nxp.com>
diff --git a/include/configs/imx8mn_evk.h b/include/configs/imx8mn_evk.h
index 1e28253..596e255 100644
--- a/include/configs/imx8mn_evk.h
+++ b/include/configs/imx8mn_evk.h
@@ -34,10 +34,10 @@
 /* Initial environment variables */
 #define CONFIG_EXTRA_ENV_SETTINGS		\
 	"script=boot.scr\0" \
-	"image=Image.itb\0" \
+	"image=Image\0" \
 	"console=ttymxc1,115200\0" \
 	"fdt_addr=0x43000000\0"			\
-	"boot_fit=try\0" \
+	"boot_fit=no\0" \
 	"fdt_file=" CONFIG_DEFAULT_FDT_FILE "\0" \
 	"initrd_addr=0x43800000\0"		\
 	"bootm_size=0x10000000\0" \