urara: I2C clock and MFIO setup function for all interfaces

urara: I2C clock and MFIO setup function for all interfaces

The I2C MFIO setup function now supports all interfaces.
Also, the API for the clock setup function changed to support
all interfaces.

BUG=chrome-os-partner:31438
TEST=tested on Pistachio bring up board; all I2C interfaces
     were tested with the TPM and they all work properly.
BRANCH=none

Change-Id: I6dfd1c4647335878402cabb2ae512d6e3737a433
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: f8a7ffb54e3f5092c9844b9b502949d3cfc053d1
Original-Change-Id: Ibd67c07acf3d1d9c594faa8ced5ab56d9abb2e40
Original-Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/256362
Original-Reviewed-by: Chris Lane <chris.lane@frontier-silicon.com>
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/9840
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>