Update BPF_MAP_TYPE_* constants

* xlat/bpf_map_types.in: Add BPF_MAP_TYPE_PERCPU_HASH,
BPF_MAP_TYPE_PERCPU_ARRAY, and BPF_MAP_TYPE_STACK_TRACE introduced by
linux kernel commits v4.6-rc1~91^2~326^2~5, v4.6-rc1~91^2~326^2~4, and
v4.6-rc1~91^2~212^2~1, respectively.
diff --git a/xlat/bpf_map_types.in b/xlat/bpf_map_types.in
index fd6e50e..b048af1 100644
--- a/xlat/bpf_map_types.in
+++ b/xlat/bpf_map_types.in
@@ -3,3 +3,6 @@
 BPF_MAP_TYPE_ARRAY 2
 BPF_MAP_TYPE_PROG_ARRAY 3
 BPF_MAP_TYPE_PERF_EVENT_ARRAY 4
+BPF_MAP_TYPE_PERCPU_HASH 5
+BPF_MAP_TYPE_PERCPU_ARRAY 6
+BPF_MAP_TYPE_STACK_TRACE 7