Use OSMO_FD_* instead of deprecated BSC_FD_*

New define is available since libosmocore 1.1.0, and we already require
1.3.0, so no need to update dependenices.
Let's change it to avoid people re-using old BSC_FD_* symbols when
copy-pasting somewhere else.

Change-Id: Ifc89fffac0443d94f3e49555684975b293ef90fb
diff --git a/src/libmsc/mncc_sock.c b/src/libmsc/mncc_sock.c
index 670d692..a3527ef 100644
--- a/src/libmsc/mncc_sock.c
+++ b/src/libmsc/mncc_sock.c
@@ -65,7 +65,7 @@
 
 	/* Actually enqueue the message and mark socket write need */
 	msgb_enqueue(&net->upqueue, msg);
-	net->mncc_state->conn_bfd.when |= BSC_FD_WRITE;
+	net->mncc_state->conn_bfd.when |= OSMO_FD_WRITE;
 	return 0;
 }
 
@@ -80,7 +80,7 @@
 	osmo_fd_unregister(bfd);
 
 	/* re-enable the generation of ACCEPT for new connections */
-	state->listen_bfd.when |= BSC_FD_READ;
+	state->listen_bfd.when |= OSMO_FD_READ;
 
 	/* release all existing calls */
 	gsm0408_clear_all_trans(state->net, TRANS_CC);
@@ -146,7 +146,7 @@
 		msg = llist_entry(net->upqueue.next, struct msgb, list);
 		mncc_prim = (struct gsm_mncc *)msg->data;
 
-		bfd->when &= ~BSC_FD_WRITE;
+		bfd->when &= ~OSMO_FD_WRITE;
 
 		/* bug hunter 8-): maybe someone forgot msgb_put(...) ? */
 		if (!msgb_length(msg)) {
@@ -161,7 +161,7 @@
 			goto close;
 		if (rc < 0) {
 			if (errno == EAGAIN) {
-				bfd->when |= BSC_FD_WRITE;
+				bfd->when |= OSMO_FD_WRITE;
 				break;
 			}
 			goto close;
@@ -185,12 +185,12 @@
 {
 	int rc = 0;
 
-	if (flags & BSC_FD_READ)
+	if (flags & OSMO_FD_READ)
 		rc = mncc_sock_read(bfd);
 	if (rc < 0)
 		return rc;
 
-	if (flags & BSC_FD_WRITE)
+	if (flags & OSMO_FD_WRITE)
 		rc = mncc_sock_write(bfd);
 
 	return rc;
@@ -222,7 +222,7 @@
 	hello->lchan_type_offset = offsetof(struct gsm_mncc, lchan_type);
 
 	msgb_enqueue(&mncc->net->upqueue, msg);
-	mncc->conn_bfd.when |= BSC_FD_WRITE;
+	mncc->conn_bfd.when |= OSMO_FD_WRITE;
 }
 
 /* accept a new connection */
@@ -245,13 +245,13 @@
 		LOGP(DMNCC, LOGL_NOTICE, "MNCC app connects but we already have "
 			"another active connection ?!?\n");
 		/* We already have one MNCC app connected, this is all we support */
-		state->listen_bfd.when &= ~BSC_FD_READ;
+		state->listen_bfd.when &= ~OSMO_FD_READ;
 		close(rc);
 		return 0;
 	}
 
 	conn_bfd->fd = rc;
-	conn_bfd->when = BSC_FD_READ;
+	conn_bfd->when = OSMO_FD_READ;
 	conn_bfd->cb = mncc_sock_cb;
 	conn_bfd->data = state;
 
@@ -294,7 +294,7 @@
 		return -1;
 	}
 
-	bfd->when = BSC_FD_READ;
+	bfd->when = OSMO_FD_READ;
 	bfd->cb = mncc_sock_accept;
 	bfd->data = state;