media: tegra-cec: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE

This change resolves a new compile-time warning
when built as a loadable module:

WARNING: modpost: missing MODULE_LICENSE() in drivers/media/platform/tegra-cec/tegra_cec.o see include/linux/module.h for more information

This adds the license as "GPL v2", which matches the header of the file.

MODULE_DESCRIPTION and MODULE_AUTHOR are also added.

---
 drivers/media/platform/tegra-cec/tegra_cec.c | 5 +++++
 1 file changed, 5 insertions(+)

index 807c94c70049..92f93a880015 100644
@@ -493,3 +493,8 @@ static struct platform_driver tegra_cec_driver = {
 };
 
 module_platform_driver(tegra_cec_driver);
+
+MODULE_DESCRIPTION("Tegra HDMI CEC driver");
+MODULE_AUTHOR("NVIDIA CORPORATION");
+MODULE_AUTHOR("Cisco Systems, Inc. and/or its affiliates");
+MODULE_LICENSE("GPL v2");

2.14.1