media: smiapp: Set correct MODULE_LICENSE

The smiapp driver is licensed under GNU GPL v2 only, as stated by the
header. Reflect this in the MODULE_LICENSE macro.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/i2c/smiapp/smiapp-core.c

@@ -3187,4 +3187,4 @@ module_i2c_driver(smiapp_i2c_driver);
 
 MODULE_AUTHOR("Sakari Ailus <sakari.ailus@iki.fi>");
 MODULE_DESCRIPTION("Generic SMIA/SMIA++ camera module driver");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");