drm/amd/display: Add pwait status to DMCUB debug logging

[Why]
To know if DMCUB is idle at the time of the debug data being collected.

[How]
Extend the logging to include the field.

It's already captured as part of each ASIC's get_diagnostic_data.

Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Matthew Stewart <matthew.stewart2@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Nicholas Kazlauskas

drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c

@@ -999,6 +999,7 @@ void dc_dmub_srv_log_diagnostic_data(struct dc_dmub_srv *dc_dmub_srv)
 	DC_LOG_DEBUG("    is_traceport_en    : %d", dc_dmub_srv->dmub->debug.is_traceport_en);
 	DC_LOG_DEBUG("    is_cw0_en          : %d", dc_dmub_srv->dmub->debug.is_cw0_enabled);
 	DC_LOG_DEBUG("    is_cw6_en          : %d", dc_dmub_srv->dmub->debug.is_cw6_enabled);
+	DC_LOG_DEBUG("    is_pwait           : %d", dc_dmub_srv->dmub->debug.is_pwait);
 }
 
 static bool dc_dmub_should_update_cursor_data(struct pipe_ctx *pipe_ctx)