hpet: Remove now superfluous sentinel element from ctl_table array

This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which
will reduce the overall build time size of the kernel and run time
memory bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)

Remove the last empty element from hpet_table.
Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

drivers/char/hpet.c

@@ -728,7 +728,6 @@ static struct ctl_table hpet_table[] = {
 	 .mode = 0644,
 	 .proc_handler = proc_dointvec,
 	 },
-	{}
 };
 
 static struct ctl_table_header *sysctl_header;