amdgpu: update amdgpu_drm.h from drm-next for 5.2

From drm-next commit b4e4538a0ab5079ae5dc401970e11f0ff2ba13a7

Adds support for:
- RAS queries
- context priority updates
- CS chunks support for scheduled dependencies
- IB flag for GDS max wave id

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>