MIPS: math-emu: Fix indentation

Fix indentation for the final 'else' blocks.
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10735/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>