Update clang-format

refer: https://github.com/openbmc/docs/blob/master/style/cpp/.clang-format

Tested: built openpower-occ-control successfully.

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I136870023229ff906d471dd4d8debfd404812ff1
diff --git a/powercap.hpp b/powercap.hpp
index bb4dc8b..212c1c2 100644
--- a/powercap.hpp
+++ b/powercap.hpp
@@ -5,10 +5,11 @@
 #include "occ_status.hpp"
 #include "utils.hpp"
 
-#include <experimental/filesystem>
 #include <sdbusplus/bus.hpp>
 #include <sdbusplus/bus/match.hpp>
 
+#include <experimental/filesystem>
+
 namespace open_power
 {
 namespace occ