ARM: dts: pxa168: add timer reset and clock

The timer was missing the clock and reset like the other peripherals.
Add them to allow the timer to continue working after boot completes.

Signed-off-by: Doug Brown <doug@schmorgal.com>
Link: https://lore.kernel.org/r/20221204005117.53452-2-doug@schmorgal.com


Signed-off-by: Arnd Bergmann <arnd@arndb.de>