mfd: intel-lpss: Provide an SSP type to the driver

The SPI driver wants to know the exact type of the controller.
Provide this information to it, hence it allows to fix the
Intel Cannon Lake and others in the future.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220301205056.79810-1-andriy.shevchenko@linux.intel.com