spi: pxa2xx-pci: Replace enum with direct use of PCI IDs

Instead of creating an abstraction on top of PCI IDs, just use them directly.
The corresponding enum can be dropped.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220225172350.69797-7-andriy.shevchenko@linux.intel.com


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