amdgpu/dc: add static to construct function

There was a global construct symbol in the module symbols, kill it.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/irq/dce110/irq_service_dce110.c

@@ -406,7 +406,7 @@ static const struct irq_service_funcs irq_service_funcs_dce110 = {
 		.to_dal_irq_source = to_dal_irq_source_dce110
 };
 
-bool construct(
+static bool construct(
 	struct irq_service *irq_service,
 	struct irq_service_init_data *init_data)
 {