arm: mvebu: Espressobin: Fix setting $fdtfile env

Ensure that 'env default -a' always set correct value to $fdtfile, even
when custom user variable is already stored in non-volatile env storage
(means that env_get("fdtfile") call returns non-NULL value).

As default value is now correctly set like if specified at compile time in
CONFIG_EXTRA_ENV_SETTINGS, there is no need to set $fdtfile explicitly via
env_set("fdtfile", ...) call.

So remove wrong skip based on env_get("fdtfile") and then also unneeded
env_set("fdtfile", ...) call.

Fixes: c4df0f6f ("arm: mvebu: Espressobin: Set default value for $fdtfile env variable")
Signed-off-by: NPali Rohár <pali@kernel.org>
Reviewed-by: NStefan Roese <sr@denx.de>

board/Marvell/mvebu_armada-37xx/board.c

@@ -133,9 +133,6 @@ int board_late_init(void)
 		device_unbind(dev);
 	}
 
-	if (env_get("fdtfile"))
-		return 0;
-
 	/* Ensure that 'env default -a' set correct value to $fdtfile */
 	if (ddr4 && emmc)
 		strcpy(ptr, "fdtfile=marvell/armada-3720-espressobin-v7-emmc.dtb");
@@ -146,10 +143,6 @@ int board_late_init(void)
 	else
 		strcpy(ptr, "fdtfile=marvell/armada-3720-espressobin.dtb");
 
-	/* If $fdtfile was not set explicitly by user then set default value */
-	if (!env_get("fdtfile"))
-		env_set("fdtfile", ptr + sizeof("fdtfile="));
-
 	return 0;
 }
 #endif