drm/amd/display: Warn instead of error on REG_WAIT timeout

[Why]
DC warns when a REG_WAIT takes a while and full-on errors
with stack dump on REG_WAIT timeout.  Most of the time it isn't
a real issue.

[How]
Make DC cool its jets - taking a while is a debug message (because
it is not something that normal users should need to be aware of),
and timeouts are warnings (because it technically shouldn't
happen, but it's not a big deal if it does)
Signed-off-by: NDavid Francis <David.Francis@amd.com>
Reviewed-by: NHarry Wentland <Harry.Wentland@amd.com>
Acked-by: NLeo Li <sunpeng.li@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -234,14 +234,14 @@ uint32_t generic_reg_wait(const struct dc_context *ctx,
 		if (field_value == condition_value) {
 			if (i * delay_between_poll_us > 1000 &&
 					!IS_FPGA_MAXIMUS_DC(ctx->dce_environment))
-				dm_output_to_console("REG_WAIT taking a while: %dms in %s line:%d\n",
+				DC_LOG_DC("REG_WAIT taking a while: %dms in %s line:%d\n",
 						delay_between_poll_us * i / 1000,
 						func_name, line);
 			return reg_val;
 		}
 	}
 
-	dm_error("REG_WAIT timeout %dus * %d tries - %s line:%d\n",
+	DC_LOG_WARNING("REG_WAIT timeout %dus * %d tries - %s line:%d\n",
 			delay_between_poll_us, time_out_num_tries,
 			func_name, line);