[U-Boot] board_pci_pre_scan() and board_pci_post_scan()

Hi Simon,

With driver model pci conversion on x86 boards, we now missed the call to board_pci_pre_scan() and board_pci_post_scan() which are called in the non-dm path. For example, board_pci_post_scan() in arch/x86/lib/fsp/fsp_common.c is not called to do any work as requested by FSP after pci enumeration.

I am not sure where we could insert these call back in the dm. Do you have any possible solution on this?

Regards, Bin