[POWERPC] 85xx: convert sbc85* boards to use machine_device_initcall

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/platforms/85xx/sbc8548.c b/arch/powerpc/platforms/85xx/sbc8548.c
index de27b57..488facb 100644
--- a/arch/powerpc/platforms/85xx/sbc8548.c
+++ b/arch/powerpc/platforms/85xx/sbc8548.c
@@ -135,13 +135,11 @@
 
 static int __init declare_of_platform_devices(void)
 {
-	if (!machine_is(sbc8548))
-		return 0;
-
 	of_platform_bus_probe(NULL, of_bus_ids, NULL);
+
 	return 0;
 }
-device_initcall(declare_of_platform_devices);
+machine_device_initcall(sbc8548, declare_of_platform_devices);
 
 /*
  * Called very early, device-tree isn't unflattened