tegra: fix memory leak

Fixes: 1755f608f5 ("tegra: Initial support")
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

src/gallium/drivers/tegra/tegra_screen.c

@@ -203,6 +203,7 @@ static int tegra_open_render_node(void)
          }
 
          if (strcmp(version->name, "nouveau") != 0) {
+            drmFreeVersion(version);
             close(fd);
             continue;
          }