i2c: designware: add new bindings

This may appear as PCI or ACPI depending upon the firmware so we
have to list both. All share the same ACPI identifier but not
the same PCI identifier.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

diff --cc drivers/i2c/busses/i2c-designware-pcidrv.c
Simple merge

diff --cc drivers/i2c/busses/i2c-designware-platdrv.c
Simple merge