powerpc: Re-order setup_panic()

Do it right after probe_machine() since it's about testing ppc_md,
and put the test in the common code.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kernel/setup-common.c

@@ -688,6 +688,8 @@ static struct notifier_block ppc_panic_block = {
 
 void __init setup_panic(void)
 {
+	if (!ppc_md.panic)
+		return;
 	atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block);
 }
 

arch/powerpc/kernel/setup_32.c

@@ -277,6 +277,8 @@ void __init setup_arch(char **cmdline_p)
 
 	probe_machine();
 
+	setup_panic();
+
 	setup_power_save();
 
 	find_legacy_serial_ports();
@@ -288,9 +290,6 @@ void __init setup_arch(char **cmdline_p)
 
 	xmon_setup();
 
-	if (ppc_md.panic)
-		setup_panic();
-
 	init_mm.start_code = (unsigned long)_stext;
 	init_mm.end_code = (unsigned long) _etext;
 	init_mm.end_data = (unsigned long) _edata;

arch/powerpc/kernel/setup_64.c

@@ -649,6 +649,8 @@ void __init setup_arch(char **cmdline_p)
 	/* Probe the machine type */
 	probe_machine();
 
+	setup_panic();
+
 	/*
 	 * We can discover serial ports now since the above did setup the
 	 * hash table management for us, thus ioremap works. We do that early
@@ -696,9 +698,6 @@ void __init setup_arch(char **cmdline_p)
 	 */
 	reserve_hugetlb_gpages();
 
-	if (ppc_md.panic)
-		setup_panic();
-
 	klp_init_thread_info(&init_thread_info);
 
 	init_mm.start_code = (unsigned long)_stext;