MPILIB: add module description and license

This patch fixes lack of license, otherwise mpi.ko taints kernel.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/lib/mpi/mpiutil.c b/lib/mpi/mpiutil.c
index 657979f..bf076d2 100644
--- a/lib/mpi/mpiutil.c
+++ b/lib/mpi/mpiutil.c
@@ -121,3 +121,6 @@
 	kfree(a);
 }
 EXPORT_SYMBOL_GPL(mpi_free);
+
+MODULE_DESCRIPTION("Multiprecision maths library");
+MODULE_LICENSE("GPL");