drm/amd/display: Change error to warning when hpd remains low for eDP

[WHY?]
SKUs that contain an unused eDP connector will throw an error when no
display is connected.

[HOW?]
Change error to a warning.
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Dillon Varone <divarone@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c

@@ -793,7 +793,7 @@ void dce110_edp_wait_for_hpd_ready(
 	dal_gpio_destroy_irq(&hpd);
 
 	if (false == edp_hpd_high) {
-		DC_LOG_ERROR(
+		DC_LOG_WARNING(
 				"%s: wait timed out!\n", __func__);
 	}
 }