MIPS: Remove a repeated word in a comment

The repeated word `the' in a comment is redundant, thus one
of them was removed from the comment.

Signed-off-by: Jason Wang <wangborong@cdjrlc.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>