google/eve: Set touchscreen I2C bus speed to 1MHz

Enable Fast-Plus speed for the touchscreen device so it can
be used at 1MHz instead of 400KHz.

BUG=chrome-os-partner:61277
TEST=manual testing on Eve P1, needs backported kernel patches
to actually make use of any I2C speed other than 400KHz

Change-Id: I3f44ff4a02a02a7b05e69ad54d4c6d60e5878393
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/18397
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
1 file changed