spi: pxa2xx: Convert pxa2xx_spi_get_port_id() to take struct device

This is preparatory patch before converting to use device_get_match_data() API.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20191018105429.82782-3-andriy.shevchenko@linux.intel.com


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