drm/tegra: fix potential uninitialized variable use

It's likely either output->drm_edid or output->ddc is non-NULL, but
avoid the uninitialized variable usage anyway.

Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/r/[email protected]
Fixes: 98365ca ("drm/tegra: convert to struct drm_edid")
Cc: Thierry Reding <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: [email protected]
Acked-by: Thierry Reding <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Jani Nikula <[email protected]>
(cherry picked from commit 8e514ba)
Signed-off-by: Thomas Zimmermann <[email protected]>

Author: jnikula

drivers/gpu/drm/tegra/output.c

@@ -21,7 +21,7 @@
 int tegra_output_connector_get_modes(struct drm_connector *connector)
 {
 	struct tegra_output *output = connector_to_output(connector);
-	const struct drm_edid *drm_edid;
+	const struct drm_edid *drm_edid = NULL;
 	int err = 0;
 
 	/*