v4l: xilinx: multi-scaler:fix corruption for YUV422 8 and 10 bpc

commit 05f96b8874e1f91400e3b29ffe46bfd4b6792bba from
https://github.com/Xilinx/linux-xlnx.git

 xlnx_rebase_v6.1

Fix the buffer size for NV16 and XV20 video formats correctly as
twice the size of stride * height.

Signed-off-by: Kunal Rane <kunal.rane@amd.com>
Reviewed-by: Vishal Sagar <vishal.sagar@amd.com>
State: pending
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>