drm: sde: Remove feature support for IGC/3D LUT for virtual planes

Attempts by virtual planes to set IGC and 3D LUT values are unsupported
and will result in LUTDMA hangs. Update virtual DRM planes capabilities
to disallow these features and make any attempts to set them a NOP.

Change-Id: I50eee7e981208ba53dfae833ab53b8fd0e5cda4e
Signed-off-by: Christopher Braga <cbraga@codeaurora.org>