clang updates

The openbmc CI was recently updated to clang-12 which requires some
formatting updates to the code:
https://github.com/openbmc/openbmc-build-scripts/commit/4569bf49daaebff06be0482426908bb5497fad08

Make those updates and refresh the clang-format file with the one from
docs:
https://github.com/openbmc/docs/blob/master/style/cpp/.clang-format

Change-Id: Ieb3626526373a053ec84431e7560003f229f338d
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/phosphor-regulators/src/dbus_sensors.hpp b/phosphor-regulators/src/dbus_sensors.hpp
index 229ae9f..590c960 100644
--- a/phosphor-regulators/src/dbus_sensors.hpp
+++ b/phosphor-regulators/src/dbus_sensors.hpp
@@ -52,8 +52,7 @@
      */
     explicit DBusSensors(sdbusplus::bus::bus& bus) :
         bus{bus}, manager{bus, sensorsObjectPath}
-    {
-    }
+    {}
 
     /** @copydoc Sensors::enable() */
     virtual void enable() override;