mux: adgs1408: use the correct MODULE_LICENSE

The file is GPL v2 or later.

Acked-by: Mircea Caprioru <mircea.caprioru@analog.com>
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/mux/adgs1408.c b/drivers/mux/adgs1408.c
index 0f7cf54..89096f1 100644
--- a/drivers/mux/adgs1408.c
+++ b/drivers/mux/adgs1408.c
@@ -128,4 +128,4 @@
 
 MODULE_AUTHOR("Mircea Caprioru <mircea.caprioru@analog.com>");
 MODULE_DESCRIPTION("Analog Devices ADGS1408 MUX driver");
-MODULE_LICENSE("GPL v2");
+MODULE_LICENSE("GPL");