rockchip: dts: rk3328: rock64: Align spi flash entry

Align the SPI flash entry with upstream. There's no need
to diverge here.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/rk3328-rock64-u-boot.dtsi b/arch/arm/dts/rk3328-rock64-u-boot.dtsi
index 8498543..6904515 100644
--- a/arch/arm/dts/rk3328-rock64-u-boot.dtsi
+++ b/arch/arm/dts/rk3328-rock64-u-boot.dtsi
@@ -54,7 +54,7 @@
 };
 
 &spi0 {
-	spi_flash: spiflash@0 {
+	spi_flash: flash@0 {
 		bootph-all;
 	};
 };