misc: xilinx-sdfec: convert to module_platform_driver()

misc: xilinx-sdfec: convert to module_platform_driver()

The driver init and exit function don't do anything besides registering
and unregistering the platform driver, so the module_platform_driver()
macro could just be used instead of having separate functions.

Signed-off-by: Harshal Chaudhari <harshalchau04@gmail.com>
Acked-by: Dragan Cvetic <dragan.cvetic@xilinx.com>
Link: https://lore.kernel.org/r/20200510164308.31358-1-harshalchau04@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>