Change statem prefix to ossl_statem

Change various state machine functions to use the prefix ossl_statem
instead.

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
diff --git a/ssl/d1_msg.c b/ssl/d1_msg.c
index e35c935..40152c2 100644
--- a/ssl/d1_msg.c
+++ b/ssl/d1_msg.c
@@ -127,7 +127,7 @@
      */
     if ((SSL_in_init(s) && !s->in_handshake) ||
         (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
-         statem_in_sctp_read_sock(s)))
+         ossl_statem_in_sctp_read_sock(s)))
 #else
     if (SSL_in_init(s) && !s->in_handshake)
 #endif