ALSA: ctxfi - Fix a typo in MODULE_LICENSE

A space has to be put between GPL and v2.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/ctxfi/xfi.c

@@ -18,7 +18,7 @@
 
 MODULE_AUTHOR("Creative Technology Ltd");
 MODULE_DESCRIPTION("X-Fi driver version 1.03");
-MODULE_LICENSE("GPLv2");
+MODULE_LICENSE("GPL v2");
 MODULE_SUPPORTED_DEVICE("{{Creative Labs, Sound Blaster X-Fi}");
 
 static unsigned int reference_rate = 48000;