[POWERPC] Use __weak macro for smp_setup_processor_id

Use the __weak macro instead of the longer __attribute__ ((weak)) form
in one place in init/main.c.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NAndrew Morton <akpm@linux-foundation.org>
--

 init/main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
Signed-off-by: NPaul Mackerras <paulus@samba.org>

init/main.c

@@ -521,7 +521,7 @@ static void __init boot_cpu_init(void)
 	cpu_set(cpu, cpu_possible_map);
 }
 
-void __init __attribute__((weak)) smp_setup_processor_id(void)
+void __init __weak smp_setup_processor_id(void)
 {
 }