Add the i2c_fpga driver for the FPGA I2C controllers

This library is used by the new FPGA-TIO driver. It is customized to
control the I2C by interacting with the FPGA programming interface.

BUG=chromium:374103
TEST=Pending test, to wait for all the stuffs ready for the FPGA-TIO driver.

Change-Id: I8e8b016231def0d974605d7faade1f95ab4511c7
Reviewed-on: https://chromium-review.googlesource.com/200214
Reviewed-by: Dean Liao <deanliao@chromium.org>
Commit-Queue: Wai-Hong Tam <waihong@chromium.org>
Tested-by: Wai-Hong Tam <waihong@chromium.org>
1 file changed