ARM: mx51_efika: fix build error due to new mfd changes

MFD changes in 4ec1b54c

 ('mfd: mfd_cell is now implicitly available to
mc13xxx drivers') changed the mc13xxx_platform_data struct layout.

At the time all users were changed, but this driver was introduced in
another tree at the same time.  This updates the mc13xxx_platform_data
user, fixing a build error.

Signed-off-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>