MA-11994 Add get phys address ioctl to dma-buf.

Add structure dma_buf_phys to store physical address.
Add DMA_BUF_IOCTL_PHYS to export physical address.

TODO: checkpatch warnings

Change-Id: Ib2f24b33462d603f2cbeef975689aaf82447d088
Signed-off-by: ivan.liu <xiaowen.liu@nxp.com>
Signed-off-by: Vipul Kumar <vipul_kumar@mentor.com>
Signed-off-by: Srikanth Krishnakar <Srikanth_Krishnakar@mentor.com>