MODULE_LICENSE expects "GPL v2", not "GPLv2"
Al Viro authored

... and we have few enough places using the latter to make it
simpler to do search and replace...
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
839cd310