MIPS: Netlogic: Remove unused pcibios_fixups

This global is unneeded, and seems to be carried over from ancient
code.

Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3752/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>