spi: pxa2xx: Fix the controller numbering for Wildcat Point

Wildcat Point has two SPI controllers and added one is actually second one.
Fix the numbering by adding the description of the first one.

Fixes: caba248d

 ("spi: spi-pxa2xx-pci: Add ID and driver type for WildcatPoint PCH")
Cc: Leif Liddy <leif.liddy@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210208163816.22147-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>