sound/oss/ac97_codec.c: restore MODULE_LICENSE

I accidentally removed the module license from sound/oss/ac97_codec.c in
commit 83bad1d764b836a482b88e0a1f44d7a5c3e1fee0 ("scheduled OSS driver
removal")

Spotted by Roland <devzero@web.de>.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

authored by Adrian Bunk and committed by Linus Torvalds d6e4218e f698f1f7

+2
+2
sound/oss/ac97_codec.c
··· 1202 1202 1203 1203 EXPORT_SYMBOL(ac97_probe_codec); 1204 1204 1205 + MODULE_LICENSE("GPL"); 1206 +