ahci-pci: Update call to ahci_probe_scsi_pci()

ahci_probe_scsi() now takes a 'base' argument, and there is an API
that prepares base address for us: ahci_probe_scsi_pci().

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