ARM: imx: mx5: Simplify TFTP server layout on MX53 Menlo board

By removing the "boot" directory in the "m53menlo/boot/fitImage" path,
we simplify the TFTP server directory layout a bit. This also requires a
change to the mmcload command as it (mis-)uses the same variable as the
TFTP boot.

Signed-off-by: Olaf Mandel <o.mandel@menlosystems.com>
Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/configs/m53menlo_defconfig b/configs/m53menlo_defconfig
index 67805b1..db3a5b9 100644
--- a/configs/m53menlo_defconfig
+++ b/configs/m53menlo_defconfig
@@ -72,7 +72,7 @@
 CONFIG_SYS_REDUNDAND_ENVIRONMENT=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_USE_BOOTFILE=y
-CONFIG_BOOTFILE="boot/fitImage"
+CONFIG_BOOTFILE="fitImage"
 CONFIG_USE_ETHPRIME=y
 CONFIG_ETHPRIME="FEC0"
 CONFIG_USE_HOSTNAME=y