clang-format: update latest spec and reformat

Copy the latest format file from the docs repository and apply.

Change-Id: I9268183de7ea36e1830b7476d6a3782376c5d9ed
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/src/power_button.cpp b/src/power_button.cpp
index 879c659..dee931f 100644
--- a/src/power_button.cpp
+++ b/src/power_button.cpp
@@ -19,8 +19,8 @@
 #include "button_handler.hpp"
 
 // add the button iface class to registry
-static ButtonIFRegister<PowerButton>
-    multiButtonRegister(phosphor::button::numberOfChassis());
+static ButtonIFRegister<PowerButton> multiButtonRegister(
+    phosphor::button::numberOfChassis());
 
 void PowerButton::simPress()
 {