drm/amdgpu: replace DRM_ERROR with DRM_WARN in ras_reserve_bad_pages

There are two cases of reserve error should be ignored:
1) a ras bad page has been allocated (used by someone);
2) a ras bad page has been reserved (duplicate error injection for one page);

DRM_ERROR is unnecessary for the failure of bad page reserve

Signed-off-by: Tao Zhou <[email protected]>
Reviewed-by: Guchun Chen <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
1 file changed