drm/amd/display: Code style adjustments

This commit address some small code style issues in DC.
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn321/dcn321_dio_link_encoder.c

@@ -186,7 +186,6 @@ void dcn321_link_encoder_construct(
 				__func__,
 				result);
 	}
-	if (enc10->base.ctx->dc->debug.hdmi20_disable) {
+	if (enc10->base.ctx->dc->debug.hdmi20_disable)
 		enc10->base.features.flags.bits.HDMI_6GB_EN = 0;
-	}
 }

drivers/gpu/drm/amd/display/dc/dm_helpers.h

@@ -36,6 +36,7 @@
 struct dc_dp_mst_stream_allocation_table;
 struct aux_payload;
 enum aux_return_code_type;
+enum set_config_status;
 
 /*
  * Allocate memory accessible by the GPU
@@ -200,7 +201,7 @@ int dm_helper_dmub_aux_transfer_sync(
 		const struct dc_link *link,
 		struct aux_payload *payload,
 		enum aux_return_code_type *operation_result);
-enum set_config_status;
+
 int dm_helpers_dmub_set_config_sync(struct dc_context *ctx,
 		const struct dc_link *link,
 		struct set_config_cmd_payload *payload,