dt-bindings: can: tcan4x5x: reset pin is active high

Change the reset pin example to active high to be in line with
the datasheet

Signed-off-by: Sean Nyekjaer <sean@geanix.com>
Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>