Cleanup asic_reg/raven1/NBIO folder.
Signed-off-by: NFeifei Xu <Feifei.Xu@amd.com>
Acked-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NJunwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>