powerpc: MorphOS recently started supporting the G5s, and it runs the G5s in non-G4-compatible mode much like Linux, therefore the DCBZ code seems to fail on them. So disable DCBZ usage for MorphOS as well.

git-svn-id: branches/fixes_3_0@31131 -

rtl/powerpc/powerpc.inc

@@ -18,7 +18,9 @@
  **********************************************************************}
 
 {$IFNDEF LINUX}
+{$IFNDEF MORPHOS}
     {$DEFINE USE_DCBZ}
+{$ENDIF MORPHOS}
 {$ENDIF LINUX}
 
 {****************************************************************************