mtd: Use platform_data to retrieve tmio_nand platform bits
With the addition of the platform device mfd_cell pointer, we can now
cleanly pass the sub device drivers platform data pointers through the
regular device platform_data one, and get rid of mfd_get_data().
Cc: Ian Molton <spyro@f2s.com> Cc: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Acked-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>