toradex: verdin-imx8mm/imx8mp: Remove bootcmd_mfg

The bootcmd_mfg env variable is legacy from IMX downstream u-boot branch
and is not needed on mainline.

Signed-off-by: Joao Paulo Goncalves <joao.goncalves@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
diff --git a/include/configs/verdin-imx8mm.h b/include/configs/verdin-imx8mm.h
index 8cb1f1a..8072d5d 100644
--- a/include/configs/verdin-imx8mm.h
+++ b/include/configs/verdin-imx8mm.h
@@ -37,7 +37,6 @@
 #define CFG_EXTRA_ENV_SETTINGS \
 	BOOTENV \
 	MEM_LAYOUT_ENV_SETTINGS \
-	"bootcmd_mfg=fastboot 0\0" \
 	"boot_file=Image\0" \
 	"boot_script_dhcp=boot.scr\0" \
 	"console=ttymxc0\0" \
diff --git a/include/configs/verdin-imx8mp.h b/include/configs/verdin-imx8mp.h
index d980bd6..256bab0 100644
--- a/include/configs/verdin-imx8mp.h
+++ b/include/configs/verdin-imx8mp.h
@@ -40,7 +40,6 @@
 #define CFG_EXTRA_ENV_SETTINGS \
 	BOOTENV \
 	MEM_LAYOUT_ENV_SETTINGS \
-	"bootcmd_mfg=fastboot 0\0" \
 	"boot_file=Image\0" \
 	"boot_scripts=boot.scr\0" \
 	"boot_script_dhcp=boot.scr\0" \