uboot-phytec

sandbox: pci: Drop the get_devfn() method

This method is not used anymore since the bus/device/function of PCI
devices can be obtained from their (parent's per-child) platform data.
Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>