a9d7d659.. (PCI: Remove pciBusAddrToHostAddr and associated nonsense)
removes pciBusAddrToHostAddr(), but not its prototype, resulting in:
./.libs/libxorg.a(sdksyms.o):(.data.rel+0xe64): undefined reference to
`pciBusAddrToHostAddr'
Signed-off-by: Chris Ball <cjb@laptop.org>