PCI: ibmphp: Remove unused assignments

Remove variables and assignments that are never used.

Found by Krzysztof using cppcheck, e.g.:

  $ cppcheck --enable=all --force
  unreadVariable drivers/pci/hotplug/ibmphp_res.c:1958 Variable 'bus_sec' is assigned a value that is never used.

Reported-by: Krzysztof Wilczyński <kw@linux.com>
Link: https://lore.kernel.org/r/20220313192933.434746-6-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

Author: bjorn-helgaas

drivers/pci/hotplug/ibmphp_hpc.c

@@ -325,11 +325,9 @@ static u8 i2c_ctrl_write(struct controller *ctlr_ptr, void __iomem *WPGBbar, u8
 static u8 isa_ctrl_read(struct controller *ctlr_ptr, u8 offset)
 {
 	u16 start_address;
-	u16 end_address;
 	u8 data;
 
 	start_address = ctlr_ptr->u.isa_ctlr.io_start;
-	end_address = ctlr_ptr->u.isa_ctlr.io_end;
 	data = inb(start_address + offset);
 	return data;
 }

drivers/pci/hotplug/ibmphp_res.c

@@ -1955,7 +1955,7 @@ static int __init update_bridge_ranges(struct bus_node **bus)
 						bus_sec = find_bus_wprev(sec_busno, NULL, 0);
 						/* this bus structure doesn't exist yet, PPB was configured during previous loading of ibmphp */
 						if (!bus_sec) {
-							bus_sec = alloc_error_bus(NULL, sec_busno, 1);
+							alloc_error_bus(NULL, sec_busno, 1);
 							/* the rest will be populated during NVRAM call */
 							return 0;
 						}
@@ -2114,6 +2114,5 @@ static int __init update_bridge_ranges(struct bus_node **bus)
 		}	/* end for function */
 	}	/* end for device */
 
-	bus = &bus_cur;
 	return 0;
 }