spi: pxa2xx: Add support for Intel Alder Lake PCH-P

Add support for LPSS SPI on Intel Alder Lake PCH-P variant.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Link: https://lore.kernel.org/r/20210114144021.1820262-1-jarkko.nikula@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>