vppinfra: add pool_foreach_pointer()

Works on pools of pointers...

Type: improvement
Change-Id: I194dec389ca4c5ec2ce3361b54a9968c9caecefc
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/.clang-format b/.clang-format
index a49d164..0680770 100644
--- a/.clang-format
+++ b/.clang-format
@@ -13,6 +13,7 @@
   - 'clib_bitmap_foreach'
   - 'pool_foreach'
   - 'pool_foreach_index'
+  - 'pool_foreach_pointer'
   - 'vec_foreach'
   - 'vec_foreach_backwards'
   - 'vec_foreach_index'