MODULE_LICENSE expects "GPL v2", not "GPLv2"

... and we have few enough places using the latter to make it
simpler to do search and replace...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/scsi/mac_esp.c b/drivers/scsi/mac_esp.c
index cd37bd6..887682a 100644
--- a/drivers/scsi/mac_esp.c
+++ b/drivers/scsi/mac_esp.c
@@ -650,7 +650,7 @@
 
 MODULE_DESCRIPTION("Mac ESP SCSI driver");
 MODULE_AUTHOR("Finn Thain <fthain@telegraphics.com.au>");
-MODULE_LICENSE("GPLv2");
+MODULE_LICENSE("GPL v2");
 MODULE_VERSION(DRV_VERSION);
 
 module_init(mac_esp_init);