doc/sequence_charts: fix naming of mncc_fsm to mncc_call

mncc_fsm.[hc] were renamed to mncc_call.[hc] during patch review, which failed
to carry through to this sequence chart.

Also fix the MNCC_ST_* to MNCC_CALL_ST_* and MNCC_EV_* to MNCC_CALL_EV_*.

Change-Id: I03ee1b43ab95dca3c43fdb9e92dc158aad5a4203
diff --git a/doc/sequence_charts/Makefile.am b/doc/sequence_charts/Makefile.am
index b667a6f..f1775c8 100644
--- a/doc/sequence_charts/Makefile.am
+++ b/doc/sequence_charts/Makefile.am
@@ -6,17 +6,17 @@
 EXTRA_DIST = \
 	inter_bsc_ho.msc \
 	inter_msc_ho.msc \
-	mncc_fsm.msc \
+	mncc_call_fsm.msc \
 	$(NULL)
 
 CLEANFILES = \
 	inter_bsc_ho.png \
 	inter_msc_ho.png \
-	mncc_fsm.png \
+	mncc_call_fsm.png \
 	$(NULL)
 
 msc: \
-	$(builddir)/mncc_fsm.png \
+	$(builddir)/mncc_call_fsm.png \
 	$(builddir)/inter_bsc_ho.png \
 	$(builddir)/inter_msc_ho.png \
 	$(NULL)