Remove dash from name used in VTY cmd prompt

Others projects don't contain a dash in there, and it seems to cause
problems with TTCN3 VTY expectations.

Change-Id: I3430abb5fc622dec293457466e760de95fa3a05c
diff --git a/src/pcu_vty.c b/src/pcu_vty.c
index afc8a9b..26d0b18 100644
--- a/src/pcu_vty.c
+++ b/src/pcu_vty.c
@@ -1215,7 +1215,7 @@
 	"There is NO WARRANTY, to the extent permitted by law.\r\n";
 
 struct vty_app_info pcu_vty_info = {
-	.name		= "Osmo-PCU",
+	.name		= "OsmoPCU",
 	.version	= PACKAGE_VERSION,
 	.copyright	= pcu_copyright,
 	.go_parent_cb	= pcu_vty_go_parent,