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-HD3Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gasket/gasket_page_table.c

@@ -898,7 +898,7 @@ static int gasket_alloc_extended_subtable(struct gasket_page_table *pg_tbl,
  *
  * Note that memory for second level page tables is allocated as needed, but
  * that memory is only freed on the final close	of the device file, when the
- * page tables are repartitioned, or the the device is removed.  If there is an
+ * page tables are repartitioned, or the device is removed.  If there is an
  * error or if the full range of slots is not available, any memory
  * allocated for second level page tables remains allocated until final close,
  * repartition, or device removal.