mips: silence _ABI* undef warnings
mips: silence _ABI* undef warnings

Signed-off-by: Bernhard Reutner-Fischer <ce1ac9e9ad16abccd7821f371ad381197b4768ac@gmail.com>

majek/uclibc-vx32,ffainelli/uClibc,foss-for-synopsys-dwc-arc-processors/uClibc,kraj/uClibc,wbx-github/uclibc-ng,kraj/uClibc,hjl-tools/uClibc,wbx-github/uclibc-ng,brgl/uclibc-ng,ffainelli/uClibc,groundwater/uClibc,majek/uclibc-vx32,hjl-tools/uClibc,wbx-github/uclibc-ng,kraj/uclibc-ng,brgl/uclibc-ng,groundwater/uClibc,brgl/uclibc-ng,majek/uclibc-vx32,foss-for-synopsys-dwc-arc-processors/uClibc,foss-for-synopsys-dwc-arc-processors/uClibc,foss-for-synopsys-dwc-arc-processors/uClibc,kraj/uclibc-ng,groundwater/uClibc,hjl-tools/uClibc,brgl/uclibc-ng,kraj/uClibc,hjl-tools/uClibc,ffainelli/uClibc,ffainelli/uClibc,ffainelli/uClibc,kraj/uclibc-ng,majek/uclibc-vx32,groundwater/uClibc,kraj/uclibc-ng,hjl-tools/uClibc,wbx-github/uclibc-ng,kraj/uClibc,groundwater/uClibc