fsp_baytrail: Add I2C driver

Add a driver wich can handle the internal I2C controllers
of Baytrail SoC. This driver is not suitable for the
SMBus controller.

Change-Id: I841c3991a2fb0f8b92b8e59ec02d62f5866f5bdf
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: http://review.coreboot.org/8401
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
3 files changed