Add the rest of the basic SQ WAVE fields to
finish off the implementation.  Eventually,
a separate interface will be needed for GPRs.
Signed-off-by: NTom St Denis <tom.stdenis@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>