edk2: Move ProcessorBind.h to contrib/edk2

Have our own ProcessorBind.h. It just includes sys/efi-edk2.h, but
undefines TRUE, FALSE and MAC. The first two are from acpica and are
redefined to something almost the same. MAC is a global option that,
well, interferes with using EDK2, dangit. I suppose I should redefine it
after, but I don't think you can save the value of a pre-processor
variable.

This breaks a little with the tradition of having this in a seprate
directory and using build magic. However, the build is already magical
enough and having this here makes things less magical. Also, EDK2 puts
this in a processor specific directory, so we won't have conflicts (they
need it there since they run on more processors than we do: we can just
include sys/efi-edk2.h which covers the smallar variance we have in
processors).

Sponsored by:		Netflix

lib/libefivar/ProcessorBind.h

@@ -1,3 +0,0 @@
-/* File in public domain */
-/* Brings in the glue for UEFI/EDK2 Tianocore code to run on this OS */
-#include <sys/efi-edk2.h>

sys/contrib/edk2/Include/ProcessorBind.h

@@ -0,0 +1,11 @@
+/*
+ * Copyright 2025 Netflix, Inc
+ *
+ * SPDX-License-Idnetifier: BSD-2-Clause
+ */
+/* These three will be redefined -- well MAC is an option that collides */
+#undef TRUE
+#undef FALSE
+#undef MAC
+#include <sys/efi-edk2.h>
+