Fixes gcc '-Wunused-but-set-variable' warning:
  drivers/pci/hotplug/cpqphp_core.c: In function 'init_SERR':
  drivers/pci/hotplug/cpqphp_core.c:124:5: warning: variable 'physical_slot' set but not used [-Wunused-but-set-variable]
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 {
        u32 tempdword;
        u32 number_of_slots;
-       u8 physical_slot;
 
        if (!ctrl)
                return 1;
        number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
        /* Loop through slots */
        while (number_of_slots) {
-               physical_slot = tempdword;
                writeb(0, ctrl->hpc_reg + SLOT_SERR);
                tempdword++;
                number_of_slots--;