rockchip: rk3399-pinephone-pro: Drop upstream props from u-boot.dtsi

The SPI flash node has been added in upstream DT, drop all props beside
bootph-* props from the SPI flash related nodes in u-boot.dtsi.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Peter Robinson <pbrobinson@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/rk3399-pinephone-pro-u-boot.dtsi b/arch/arm/dts/rk3399-pinephone-pro-u-boot.dtsi
index 037cec1..7438bec 100644
--- a/arch/arm/dts/rk3399-pinephone-pro-u-boot.dtsi
+++ b/arch/arm/dts/rk3399-pinephone-pro-u-boot.dtsi
@@ -15,13 +15,8 @@
 };
 
 &spi1 {
-	status = "okay";
-
 	flash@0 {
-		compatible = "jedec,spi-nor";
-		reg = <0>;
 		bootph-pre-ram;
 		bootph-some-ram;
-		spi-max-frequency = <10000000>;
 	};
 };