hwrng: octeon: add missing MODULE_DESCRIPTION()

Add missing MODULE_DESCRIPTION() that is now required.

---
Cc: Olivia Mackall <[email protected]>
Cc: Herbert Xu <[email protected]>
Cc: [email protected]
Cc: Arnd Bergmann <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Thomas Bogendoerfer <[email protected]>
Cc: [email protected]

 drivers/char/hw_random/octeon-rng.c |    1 +
 1 file changed, 1 insertion(+)

@@ -116,3 +116,4 @@ module_platform_driver(octeon_rng_driver
 
 MODULE_AUTHOR("David Daney");
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cavium Octeon HW random number generator");