xilinx: Remove .owner field for drivers

xilinx: Remove .owner field for drivers

All drivers using module_platform_driver or platform_driver_register
don't need to to init .owner field.

Based on the patch from Peter Griffin <peter.griffin@linaro.org>
"mmc: remove .owner field for drivers using module_platform_driver"

This patch removes the superflous .owner field for drivers which
use the module_platform_driver API, as this is overriden in
platform_driver_register anyway.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>