ARM: dts: rockchip: remove clock-names property from watchdog node in rv1108.dtsi

ARM: dts: rockchip: remove clock-names property from watchdog node in rv1108.dtsi

A test with the command below gives this error:

/arch/arm/boot/dts/rv1108-evb.dt.yaml: watchdog@10360000:
clock-names:0: 'tclk' was expected

Comment from the dw_wdt.c file:

Try to request the watchdog dedicated timer clock source. It must
be supplied if asynchronous mode is enabled. Otherwise fallback
to the common timer/bus clocks configuration, in which the very
first found clock supply both timer and APB signals.

Like in the other Rockchip watchdog nodes the property "clock-names"
is not needed, so remove it.

make ARCH=arm dtbs_check
DT_SCHEMA_FILES=Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20201218120534.13788-8-jbx6244@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>