IB/core: Add ROCE_UDP_ENCAP (RoCE V2) type

Adding RoCE v2 GID type and port type. Vendors
which support this type will get their GID table
populated with RoCE v2 GIDs automatically.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c
index 06e47e1..4a2968b 100644
--- a/drivers/infiniband/core/cache.c
+++ b/drivers/infiniband/core/cache.c
@@ -128,6 +128,7 @@
 
 static const char * const gid_type_str[] = {
 	[IB_GID_TYPE_IB]	= "IB/RoCE v1",
+	[IB_GID_TYPE_ROCE_UDP_ENCAP]	= "RoCE v2",
 };
 
 const char *ib_cache_gid_type_str(enum ib_gid_type gid_type)