linux-imx

vfio/fsl-mc: Add read/write support for fsl-mc devices

This patch adds support to read and write ioctls for
fsl-mc devices. Only read-write to DPRC/DPMCP devices
are supported while read writes on other fsl-mc devices
is not supported by this patch.

Also current patch limits userspace to write complete
64byte command once and read 64byte response by one ioctl.

Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
Signed-off-by: Diana Craciun <diana.craciun@nxp.com>