serial: ns16550: Add a PCI device/function field

When this UART is used early in boot (before PCI is set up) it is
convenient to store the PCI BDF of the UART so that it can be manually
configured. This is useful when it is used as a debug UART, for example.

Add a new field to hold this information, so that drivers can simply use
the existing platform data.

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