zebra: Collapse struct static_ipv[4|6] into struct static_route

The 'struct static_ipv4' and 'struct static_ipv6' structures
are essentially the same.  Collapse them into one data structure
'struct static_route'.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
diff --git a/lib/memtypes.c b/lib/memtypes.c
index 57de5c4..5f78493 100644
--- a/lib/memtypes.c
+++ b/lib/memtypes.c
@@ -82,8 +82,7 @@
   { MTYPE_NEXTHOP,		"Nexthop"			},
   { MTYPE_RIB,			"RIB"				},
   { MTYPE_RIB_QUEUE,		"RIB process work queue"	},
-  { MTYPE_STATIC_IPV4,		"Static IPv4 route"		},
-  { MTYPE_STATIC_IPV6,		"Static IPv6 route"		},
+  { MTYPE_STATIC_ROUTE,		"Static route"			},
   { MTYPE_RIB_DEST,		"RIB destination"		},
   { MTYPE_RIB_TABLE_INFO,	"RIB table info"		},
   { MTYPE_NETLINK_NAME,	"Netlink name"			},