ARM: dts: rockchip: fix audio interrupts on rk3288

These must be translated from the values in the TRM by subtracting 32,
which has not been done.  The SPDIF interrupt is also off-by-one.

Signed-off-by: John Keeping <john@metanate.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>