drm/amdgpu: init aperture definitions (v2)

v2: agd: move apertures to mc structure

Signed-off-by: Flora Cui <Flora.Cui@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 946ef0c..d5eed6b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -570,6 +570,11 @@ struct amdgpu_mc {
 	uint32_t                srbm_soft_reset;
 	struct amdgpu_mode_mc_save save;
 	bool			prt_warning;
+	/* apertures */
+	u64					shared_aperture_start;
+	u64					shared_aperture_end;
+	u64					private_aperture_start;
+	u64					private_aperture_end;
 };
 
 /*