powerpc/64: Move 64-bit probe_machine() to later in the boot process

We no long need the machine type that early, so we can move probe_machine()
to after the device-tree has been expanded. This will allow further
consolidation.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/platforms/cell/setup.c

@@ -255,10 +255,8 @@ static void __init cell_setup_arch(void)
 
 static int __init cell_probe(void)
 {
-	unsigned long root = of_get_flat_dt_root();
-
-	if (!of_flat_dt_is_compatible(root, "IBM,CBEA") &&
-	    !of_flat_dt_is_compatible(root, "IBM,CPBW-1.0"))
+	if (!of_machine_is_compatible("IBM,CBEA") &&
+	    !of_machine_is_compatible("IBM,CPBW-1.0"))
 		return 0;
 
 	pm_power_off = rtas_power_off;