arm64: apple: t600x: pmgr: SIO: Add audio, spi and uart power-domains

The power-domains AUDIO_P, SPI_P and UART_P are necessary for SIO's ASC
firmware to run. This is not explicitly expressed in the ADT (probably
since the power-domains are implicitly turned on when macOS uses SIO).
Since we plan to use SIO only for DP/HDMI audio add the power-domains
explicitly as dependency of ps_sio_cpu.
They might be better placed directly into the SIO node butr the SIO
driver doesn't support multiple power-domains.

Signed-off-by: Janne Grunau <j@jannau.net>

Author: jannau

arch/arm64/boot/dts/apple/t600x-pmgr.dtsi

@@ -826,7 +826,7 @@
 		#power-domain-cells = <0>;
 		#reset-cells = <0>;
 		label = DIE_LABEL(sio_cpu);
-		power-domains = <&DIE_NODE(ps_sio)>;
+		power-domains = <&DIE_NODE(ps_sio) &DIE_NODE(ps_uart_p) &DIE_NODE(ps_spi_p) &DIE_NODE(ps_audio_p)>;
 	};
 
 	DIE_NODE(ps_fpwm0): power-controller@190 {