9a9c59a8 Fri Jan 15 17:03:18 CST 2021 Alex Sierra <alex.sierra@amd.com> drm/amdgpu: enable 48-bit IH timestamp counter
By default this timestamp is 32 bit counter. It gets overflowed in around 10 minutes.
Signed-off-by: Alex Sierra <alex.sierra@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>