arm64: dts: rockchip: Add vcc-supply to SPI flash on rk3399-pinebook-pro

As described in the pinebookpro_v2.1_mainboard_schematic.pdf page 10,
he SPI Flash's VCC connector is connected to VCC_3V0 power source.

This fixes the following warning:

  spi-nor spi1.0: supply vcc not found, using dummy regulator

Fixes: 5a65505 ("arm64: dts: rockchip: Add initial support for Pinebook Pro")
Signed-off-by: Peter Robinson <[email protected]>
Reviewed-by: Dragan Simic <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Heiko Stuebner <[email protected]>

Author: nullr0ute

arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts

@@ -959,6 +959,7 @@
 		reg = <0>;
 		m25p,fast-read;
 		spi-max-frequency = <10000000>;
+		vcc-supply = <&vcc_3v0>;
 	};
 };