drm/amd/display: Fix warnings about uninitialized use

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_link.c

@@ -541,7 +541,7 @@ bool dc_link_detect(struct dc_link *link, bool boot)
 	struct audio_support *aud_support = &link->dc->res_pool->audio_support;
 	enum dc_edid_status edid_status;
 	struct dc_context *dc_ctx = link->ctx;
-	struct dc_sink *sink;
+	struct dc_sink *sink = NULL;
 	enum dc_connection_type new_connection_type = dc_connection_none;
 
 	if (link->connector_signal == SIGNAL_TYPE_VIRTUAL)

drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c

@@ -265,6 +265,8 @@ static bool get_hw_supported_ddc_line(
 {
 	enum gpio_ddc_line line_found;
 
+	*line = GPIO_DDC_LINE_UNKNOWN;
+
 	if (!ddc) {
 		BREAK_TO_DEBUGGER();
 		return false;