hwrng: nomadik - add MODULE_DESCRIPTION

Add a MODULE_DESCRIPTION to fix the W=1 warning

WARNING: modpost: missing MODULE_DESCRIPTION() in
drivers/char/hw_random/nomadik-rng.o
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/char/hw_random/nomadik-rng.c

@@ -88,4 +88,5 @@ static struct amba_driver nmk_rng_driver = {
 
 module_amba_driver(nmk_rng_driver);
 
+MODULE_DESCRIPTION("ST-Ericsson Nomadik Random Number Generator");
 MODULE_LICENSE("GPL");