SSB_PCICORE_HOSTMODE protects MIPS specific code that calls not exported
symbols pcibios_enable_device and register_pci_controller. This code is
supposed to be compiled only with ssb builtin.
Reported-by: Matt Redfearn <matt.redfearn@mips.com> Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Reviewed-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>