PCI: Remove unused pcibios_select_root() (again)

a6c140969b46 ("Delete pcibios_select_root") removed pcibios_select_root().
But a7db50405216 ("PCI: remove pcibios_scan_all_fns()") added a few copies
back, probably with some incorrect merge conflict resolutions.

Remove the still-unused pcibios_select_root() definitions.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

diff --cc arch/ia64/include/asm/pci.h
Simple merge

diff --cc arch/microblaze/include/asm/pci.h
Simple merge

diff --cc arch/mn10300/include/asm/pci.h
Simple merge

diff --cc include/asm-generic/pci.h
Simple merge