mmc: SDHI should depend on SUPERH || ARCH_SHMOBILE

Fix build breakage on platforms, not providing readsw and writesw
functions, e.g., on x86(_64).

Reported-by: Stephen Rothwell <[email protected]>
Signed-off-by: Guennadi Liakhovetski <[email protected]>
Signed-off-by: Chris Ball <[email protected]>
1 file changed