dt-binding: watchdog: add more Rockchip compatibles to snps,dw-wdt.yaml

dt-binding: watchdog: add more Rockchip compatibles to snps,dw-wdt.yaml

The watchdog compatible strings are suppose to be SoC orientated.
In the more recently added Rockchip SoC dtsi files only
the fallback string "snps,dw-wdt" is used, so add the following
compatible strings:

"rockchip,px30-wdt", "snps,dw-wdt"
"rockchip,rk3228-wdt", "snps,dw-wdt"
"rockchip,rk3308-wdt", "snps,dw-wdt"
"rockchip,rk3328-wdt", "snps,dw-wdt"
"rockchip,rk3399-wdt", "snps,dw-wdt"
"rockchip,rv1108-wdt", "snps,dw-wdt"

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

make ARCH=arm64 dtbs_check
DT_SCHEMA_FILES=Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20201218120534.13788-1-jbx6244@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>