loadbootenv expects devtype variable to be set. This is missing in
mmcboot command. With this the following error comes:
U-Boot# run mmcboot
mmc0 is current device
SD/MMC found on device 0
** Bad device usb 0 **
** Bad device usb 0 **
Fixing this by setting devtype as mmc.
Reported-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NLokesh Vutla <lokeshvutla@ti.com>