smc91x on x3proto needs 16-bit access and nowait, which we can now do
through the platform data.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This flattens out the board directories in to individual mach groups,
we will use this for getting rid of unneeded directories, simplifying
the build system, and becoming more coherent with the refactored
arch/sh/include topology.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>