MIPS: Random whitespace clean-ups

Another whitespace clean-up, this removes tabs from between sentences in
some comments.

Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6103/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --cc arch/mips/include/asm/addrspace.h
Simple merge

diff --cc arch/mips/include/asm/atomic.h
Simple merge

diff --cc arch/mips/include/asm/barrier.h
Simple merge