crypto: doc - add crypto_rng_generate

Add new crypto API call crypto_rng_generate to DocBook.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Documentation/DocBook/crypto-API.tmpl

@@ -1815,6 +1815,7 @@ read(opfd, out, outlen);
 !Finclude/crypto/rng.h crypto_alloc_rng
 !Finclude/crypto/rng.h crypto_rng_alg
 !Finclude/crypto/rng.h crypto_free_rng
+!Finclude/crypto/rng.h crypto_rng_generate
 !Finclude/crypto/rng.h crypto_rng_get_bytes
 !Finclude/crypto/rng.h crypto_rng_reset
 !Finclude/crypto/rng.h crypto_rng_seedsize