dt-bindings: reset: Add Delta TN48M

Add header for the Delta TN48M CPLD provided
resets.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Link: https://lore.kernel.org/r/20220131133049.77780-4-robert.marko@sartura.hr


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