copyright: fix typo: sysmocom s/s.m.f.c./s.f.m.c./ GmbH

Change-Id: I81687235fedcbbb686db7def59318e891e00ced7
diff --git a/src/libmsc/gsup_client_mux.c b/src/libmsc/gsup_client_mux.c
index 3d88349..1900377 100644
--- a/src/libmsc/gsup_client_mux.c
+++ b/src/libmsc/gsup_client_mux.c
@@ -1,6 +1,6 @@
 /* Directing individual GSUP messages to their respective handlers. */
 /*
- * (C) 2019 by sysmocom - s.m.f.c. GmbH <info@sysmocom.de>
+ * (C) 2019 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
  * All Rights Reserved
  *
  * Author: Neels Hofmeyr