i2c: mchp-pci1xxxx: Update Timing registers

Update I2C timing registers based on latest hardware design.
This fix does not break functionality of chips with older design and
existing users will not be affected.

Fixes: 36169369 ("i2c: microchip: pci1xxxx: Add driver for I2C host controller in multifunction endpoint of pci1xxxx switch")
Signed-off-by: Tharun Kumar P <tharunkumar.pasumarthi@microchip.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>