Kunimitsu: Set I2C[4] port voltage to 1.8v

As the audio card needs 1.8V I2C operation. This patch adds
entry into devicetree.cb to set I2C port 4 operate at 1.8V.

Branch=None
Bug=chrome-os-partner:47821
Test=Built & booted kunimitsu board. Verified that I2C
port 4 is operating at 1.8V level

CQ-DEPEND=CL:*242225, CL:*241206, CL:315167

Change-Id: Ifbb65e3d83561b52cc18e48b89d146c2f88f289b
Signed-off-by: Naresh G Solanki <Naresh.Solanki@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/315168
Commit-Ready: Naresh Solanki <naresh.solanki@intel.com>
Tested-by: Robbie Zhang <robbie.zhang@intel.com>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
1 file changed