Importing usr.bin/colrm

No Minix-specific changes needed.

Change-Id: I3e1b8fd433ab976e1041575e9e654a5205277a29
arm:mmc driver refactor (use structs)

Defined register offsets and device configurations in structs to
allow more flexibility. This change will allow to support multiple
instances of a driver using a different bus. This is needed for the
BeagleBone Black.

Change-Id: I24e16faeea338c9a847941a846e6d4e49432525e