Add simpler method for relocating functions to RAM. (#21804)

platforms/chibios/_util.h

@@ -0,0 +1,9 @@
+// Copyright 2023 Nick Brassel (@tzarc)
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+
+#define RESIDENT_IN_RAM(funcname) __attribute__((section(".ram0_init." #funcname), noinline)) funcname
+
+#if __has_include_next("_util.h")
+#    include_next "_util.h"
+#endif