* ARM PrimeCell MultiMedia Card Interface (MMCI) PL180/1

The ARM PrimeCell MMCI PL180 and PL181 provides an interface for
reading and writing to MultiMedia and SD cards alike.

This file documents differences between the core properties described
by mmc.txt and the properties used by the mmci driver.

Required properties:
- compatible             : contains "arm,pl18x", "arm,primecell".
- arm,primecell-periphid : contains the PrimeCell Peripheral ID.

Optional properties:
- mmc-cap-mmc-highspeed  : indicates whether MMC is high speed capable
- mmc-cap-sd-highspeed   : indicates whether SD is high speed capable
