parisc: fix redefinition of SET_PERSONALITY

commit e72837e3 introduced
a default SET_PERSONALITY() in include/linux/elf.h.
This breaks with our own SET_PERSONALITY define for
32bit userspace on 64bit kernel.
Signed-off-by: Helge Deller <deller@gmx.de>

arch/parisc/kernel/binfmt_elf32.c

@@ -85,6 +85,7 @@ struct elf_prpsinfo32
  * could set a processor dependent flag in the thread_struct.
  */
 
+#undef SET_PERSONALITY
 #define SET_PERSONALITY(ex) \
 	set_thread_flag(TIF_32BIT); \
 	current->thread.map_base = DEFAULT_MAP_BASE32; \