i2c: designware-pci: add 10-bit addressing mode functionality for BYT I2C

All the I2C controllers on Intel BayTrail LPSS subsystem able
to support 10-bit addressing mode functionality.

Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@intel.com>
Signed-off-by: Ong, Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>