ARM: dts: rockchip: fix rk3288 watchdog irq

commit 1a1b698b upstream.

The watchdog irq is actually SPI 79, which translates to the original
111 in the manual where the SPI irqs start at 32.
The current dw_wdt driver does not use the irq at all, so this issue
never surfaced. Nevertheless fix this for a time we want to use the irq.

Fixes: 2ab557b7

 ("ARM: dts: rockchip: add core rk3288 dtsi")
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>