Add missing rtl/powerpc/cpuprocs.inc

rtl/powerpc/cpuprocs.inc

@@ -0,0 +1,16 @@
+{
+    Defines CPU intrinsics for PowerPC
+
+    This file is part of the Free Pascal run time library.
+    Copyright (c) 2025 by the Free Pascal development team.
+
+    See the file COPYING.FPC, included in this distribution,
+    for details about the copyright.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+ **********************************************************************}
+
+procedure fpc_ppc_yield;[internproc:fpc_in_ppc_yield];