drm: replace "drm_connector_unreference" with "drm_connector_put"

This patch unifies the naming of DRM functions for reference counting as
requested on Documentation/gpu/todo.rst

Signed-off-by: Fernando Ramos <greenfoo@gluegarage.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20181115221634.22715-6-greenfoo@gluegarage.com

drivers/gpu/drm/bridge/tc358764.c

@@ -379,7 +379,7 @@ static void tc358764_detach(struct drm_bridge *bridge)
 	drm_fb_helper_remove_one_connector(drm->fb_helper, &ctx->connector);
 	drm_panel_detach(ctx->panel);
 	ctx->panel = NULL;
-	drm_connector_unreference(&ctx->connector);
+	drm_connector_put(&ctx->connector);
 }
 
 static const struct drm_bridge_funcs tc358764_bridge_funcs = {