Ensure only valid Kconfig configurations for PCI_REALLOC_ENABLE_AUTO. This
is done by selecting PCI_IOV, which is required by PCI_REALLOC_ENABLE_AUTO
to work.
Signed-off-by: NSascha El-Sharkawy <elscha@sse.uni-hildesheim.de>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>