Blackfin: cm-bf537e/cm-bf537u/tcm-bf537: enable mmc_spi support

These boards have an mmc/sd slot on them connected over SPI, so
enable the driver.

Signed-off-by: Harald Krapfenbauer <harald.krapfenbauer@bluetechnix.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
3 files changed