misc: vop: set VIRTIO_F_ACCESS_PLATFORM for vop driver

Set VIRTIO_F_ACCESS_PLATFORM feature for vop driver, as the DMA mapping
details shouldn't decide on the virtio implementation, but the host PCIe
implementation.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Link: https://lore.kernel.org/r/20200929084944.24146-1-sherry.sun@nxp.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>