media: v4l2: remove videobuf2-dma-nvmap.c

media: v4l2: remove videobuf2-dma-nvmap.c

NvMap is not really necessary for v4l2-core. Remove the dependencies
on NvMap and delete related driver videobuf2-dma-nvmap.c.

Change-Id: I1d8ab709baf262c2127a7fdaa007e5794b193b1e
Signed-off-by: Bryan Wu <pengw@nvidia.com>
Reviewed-on: http://git-master/r/278536
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Krishna Reddy <vdumpa@nvidia.com>
(cherry picked from commit 174ec53c55e4236a3214152a1b4179764f0e898f)
Signed-off-by: Ajay Nandakumar <anandakumarm@nvidia.com>