[POWERPC] Remove bus_offset in places its not really used

The user of the fsl_pcie code doesn't set bus_offset and 82xx doesn't
require it either.  Remove the places in the code that reference it so
we can remove it all together.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

arch/powerpc/platforms/82xx/mpc82xx_ads.c

@@ -552,7 +552,6 @@ static void __init mpc82xx_add_bridge(struct device_node *np)
 
 	hose->first_busno = bus_range ? bus_range[0] : 0;
 	hose->last_busno = bus_range ? bus_range[1] : 0xff;
-	hose->bus_offset = 0;
 
 	setup_indirect_pci(hose,
 			   r.start + offsetof(pci_cpm2_t, pci_cfg_addr),

arch/powerpc/sysdev/fsl_pcie.c

@@ -50,12 +50,12 @@ indirect_read_config_pcie(struct pci_bus *bus, unsigned int devfn, int offset,
 	if (bus->number == 0xff) {
 		PCI_CFG_OUT(hose->cfg_addr,
 			    (0x80000000 | ((offset & 0xf00) << 16) |
-			     ((bus->number - hose->bus_offset) << 16)
+			     (bus->number<< 16)
 			     | (devfn << 8) | ((offset & 0xfc) )));
 	} else {
 		PCI_CFG_OUT(hose->cfg_addr,
 			    (0x80000001 | ((offset & 0xf00) << 16) |
-			     ((bus->number - hose->bus_offset) << 16)
+			     (bus->number<< 16)
 			     | (devfn << 8) | ((offset & 0xfc) )));
 	}
 
@@ -101,12 +101,12 @@ indirect_write_config_pcie(struct pci_bus *bus, unsigned int devfn, int offset,
 	if (bus->number == 0xff) {
 		PCI_CFG_OUT(hose->cfg_addr,
 			    (0x80000000 | ((offset & 0xf00) << 16) |
-			     ((bus->number - hose->bus_offset) << 16)
+			     (bus->number << 16)
 			     | (devfn << 8) | ((offset & 0xfc) )));
 	} else {
 		PCI_CFG_OUT(hose->cfg_addr,
 			    (0x80000001 | ((offset & 0xf00) << 16) |
-			     ((bus->number - hose->bus_offset) << 16)
+			     (bus->number << 16)
 			     | (devfn << 8) | ((offset & 0xfc) )));
         }