drm/amd/display: sync dmub output event type.

[why]
dmubfw added a new event type, update amdgpu to avoid "notify type 6
invalid"
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Reviewed-by: Chris Park <chris.park@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -877,6 +877,7 @@ static void dm_dmub_outbox1_low_irq(void *interrupt_params)
 		"HPD_IRQ",
 		"SET_CONFIGC_REPLY",
 		"DPIA_NOTIFICATION",
+		"HPD_SENSE_NOTIFY",
 	};
 
 	do {