MIPS: math-emu: Reindent `bc_op' emulation

Correct the double-tab indentation of the branch-likely not-taken case.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9674/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>