fpga: dfl: afu: use parent device to log errors on port enable/disable

fpga: dfl: afu: use parent device to log errors on port enable/disable

AFU port enable/disable may be triggered from userspace at any point,
e.g., after a port has been released. This commit prepares a subsequent
commit that destroys the port platform device on port release, which is
then no longer available during port enable/disable. Use the parent,
physical DFL, e.g., PCIe FPGA device instead for logging errors.

Signed-off-by: Peter Colberg <peter.colberg@intel.com>
Reviewed-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>
Reviewed-by: Basheer Ahmed Muddebihal <basheer.ahmed.muddebihal@linux.intel.com>
Acked-by: Xu Yilun <yilun.xu@intel.com>
Link: https://lore.kernel.org/r/20241120011035.230574-4-peter.colberg@intel.com
Signed-off-by: Xu Yilun <yilun.xu@linux.intel.com>