s390/pci: use pci_scan_root_bus
The pci config space accessors on s390 are (now) smart enough to figure out if a pci function is available. So instead of calling pci_create_root_bus and then pci_scan_single_device for each available function just call pci_scan_root_bus and let the pci core do the scanning (via config reads on all possible functions) and device creation. Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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