amdgpu: sync up amdgpu_drm.h with latest from kernel

From drm-next:

commit 2cbcb78c9ee5520c8d836c7ff57d1b60ebe8e9b7
Merge: 06debd6e1b28 8c44390d8872
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Fri Mar 26 15:52:01 2021 +0100

    Merge tag 'amd-drm-next-5.13-2021-03-23' of https://gitlab.freedesktop.org/agd5f/linux into drm-next

    amd-drm-next-5.13-2021-03-23:

    amdgpu:
    ...

    UAPI:
    - amdgpu: Add a new INFO ioctl interface to query video capabilities
      rather than hardcoding them in userspace.  This allows us to provide
      fine grained asic capabilities (e.g., if a particular part is
      bandwidth limited, we can limit the capabilities).  Proposed userspace:
      https://gitlab.freedesktop.org/leoliu/drm/-/commits/info_video_caps
      https://gitlab.freedesktop.org/leoliu/mesa/-/commits/info_video_caps


    ...

    Danvet: A bunch of conflicts all over, but it seems to compile ... I
    did put the call to dc_allow_idle_optimizations() on a single line
    since it looked a bit too jarring to be left alone.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
    From: Alex Deucher <alexander.deucher@amd.com>
    Link: https://patchwork.freedesktop.org/patch/msgid/20210324040147.1990338-1-alexander.deucher@amd.com



Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>