datapath/ipcache: Indent GC code
datapath/ipcache: Indent GC code

This reduces the LoC diff for the following patch. No functional change.

Signed-off-by: Joe Stringer <16a9a54ddf4259952e3c118c763138e83693d7fd@covalent.io>

tgraf/cilium,cilium/cilium,cilium/cilium,michi-covalent/cilium,cilium-team/cilium,cilium/cilium,tgraf/cilium,michi-covalent/cilium,scanf/cilium,tgraf/cilium,michi-covalent/cilium,tgraf/cilium,scanf/cilium,scanf/cilium,michi-covalent/cilium,tklauser/cilium,tgraf/cilium,scanf/cilium,scanf/cilium,tklauser/cilium,tklauser/cilium,tgraf/cilium,tklauser/cilium,cilium/cilium,scanf/cilium,tklauser/cilium,scanf/cilium,michi-covalent/cilium,cilium/cilium,cilium-team/cilium