spi/pxa2xx: add Intel BayTrail ACPI ID

Intel BayTrail has one general purpose SPI controller that is compatible
with Intel Low Power Subsystem SPI. The controller is enumerated from ACPI
namespace with ACPI ID 80860F0E.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>