[POWERPC] pci32: Remove obsolete PowerMac bus number hack

The 32 bits PCI code carries an old hack that was only useful for G5
machines.  Nowdays, the 32 bits kernel doesn't support any of those
machines anymore so the hack is basically never used, so remove it.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/kernel/pci_32.c

@@ -922,17 +922,6 @@ long sys_pciconfig_iobase(long which, unsigned long bus, unsigned long devfn)
 	struct pci_controller* hose;
 	long result = -EOPNOTSUPP;
 
-	/* Argh ! Please forgive me for that hack, but that's the
-	 * simplest way to get existing XFree to not lockup on some
-	 * G5 machines... So when something asks for bus 0 io base
-	 * (bus 0 is HT root), we return the AGP one instead.
-	 */
-#ifdef CONFIG_PPC_PMAC
-	if (machine_is(powermac) && machine_is_compatible("MacRISC4"))
-		if (bus == 0)
-			bus = 0xf0;
-#endif /* CONFIG_PPC_PMAC */
-
 	hose = pci_bus_to_hose(bus);
 	if (!hose)
 		return -ENODEV;