PCI: cpcihp: Add missing curly braces in cpci_configure_slot()

I don't have this hardware but it looks like we weren't adding bridge
devices as intended.  Maybe the bridge is always the last device?

Fixes: 05b12500 ("PCI: cpcihp: Iterate over all devices in slot, not functions 0-7")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yijing Wang <wangyijing@huawei.com>
CC: stable@vger.kernel.org	# v3.9+