Staging: gasket: fix typo in gasket_page_table.c comments.

I have found double typed comments "the the". So i modified it to
one "the".

Signed-off-by: Kyoungho Koo <rnrudgh@gmail.com>
Link: https://lore.kernel.org/r/20200425090714.GA2105@koo-Z370-HD3


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>