RE: [MIPS] RFA: Use new rtl iterators in mips_record_lo_sums

[Matthew Fortune]

> gcc/
>       * config/mips/mips.c (mips_record_lo_sum): Replace with...
>       (mips_record_lo_sums): ...this new function.
>       (mips_reorg_process_insns): Update accordingly.

OK