- enable USB gadget and DFU
- enable MCI and probe at boot
- enable EXT4 and FAT filesystems

Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

We never supported the sigmatel stm chips and probably
never will. So do the first step and rename the architecture
to mxs just like in the kernel.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Note: This is work in progress. Use with care.

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>