arm64: dts: rockchip: rename flash nodenames

Nodes with compatible "jedec,spi-nor" are now checked with
jedec,spi-nor.yaml and mtd.yaml. The pattern is now
"^flash(@.*)?$", so change that for the boards with a
Rockchip SoC.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20210711145900.15443-1-jbx6244@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3328-rock64.dts

@@ -345,7 +345,7 @@ &spdif {
 &spi0 {
 	status = "okay";
 
-	spiflash@0 {
+	flash@0 {
 		compatible = "jedec,spi-nor";
 		reg = <0>;
 

arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi

@@ -543,7 +543,7 @@ &spi1 {
 	pinctrl-names = "default", "sleep";
 	pinctrl-1 = <&spi1_sleep>;
 
-	spiflash@0 {
+	flash@0 {
 		compatible = "jedec,spi-nor";
 		reg = <0>;