fpga: microchip-spi: add missing module author entry

Add the missing MODULE_AUTHOR entry for the Microchip spi-slave FPGA
programming driver.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Ivan Bornyakov <i.bornyakov@metrotek.ru>
Reviewed-by: Tom Rix <trix@redhat.com>
Acked-by: Xu Yilun <yilun.xu@intel.com>
Link: https://lore.kernel.org/r/20220728075012.3136914-1-conor.dooley@microchip.com


Signed-off-by: Xu Yilun <yilun.xu@intel.com>