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

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

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Link: https://lore.kernel.org/r/20210415135917.54144-1-jarkko.nikula@linux.intel.com


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