arm64: dts: rockchip: Assign mic irq to correct device for Gru

Currently we are assigning mic irq to rt5514 i2c driver, which is wrong.
Assign it to rt5514 spi driver instead.

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>