Add kASLR for rk3399 u-boot (#4311)

* Add rk3399's rng to u-boot.

* Add kASLR support to the NanoPi R4S' u-boot.

* Fix rng for rk3399.

The manual clocks screw it up, so remove those.

patch/u-boot/u-boot-rockchip64/rk3399-rp64-kaslr.patch

@@ -0,0 +1,11 @@
+diff --git a/configs/nanopi-r4s-rk3399_defconfig b/configs/nanopi-r4s-rk3399_defconfig
+index 65423202..ca8955f8 100644
+--- a/configs/nanopi-r4s-rk3399_defconfig
++++ b/configs/nanopi-r4s-rk3399_defconfig
+@@ -63,3 +63,6 @@ CONFIG_VIDEO_ROCKCHIP=y
+ CONFIG_DISPLAY_ROCKCHIP_HDMI=y
+ CONFIG_SPL_TINY_MEMSET=y
+ CONFIG_ERRNO_STR=y
++CONFIG_DM_RNG=y
++CONFIG_CMD_KASLRSEED=y
++CONFIG_RNG_ROCKCHIP=y

patch/u-boot/u-boot-rockchip64/rk3399-rp64-rng.patch

@@ -1,21 +1,17 @@
 diff --git a/arch/arm/dts/rk3399.dtsi b/arch/arm/dts/rk3399.dtsi
-index 3871c7fd..5518b765 100644
+index 3871c7fd..fda51508 100644
 --- a/arch/arm/dts/rk3399.dtsi
 +++ b/arch/arm/dts/rk3399.dtsi
-@@ -1937,6 +1937,16 @@
-                };
-        };
+@@ -1937,6 +1937,12 @@
+ 		};
+ 	};
 
-+       rng: rng@ff8b8000 {
-+               compatible = "rockchip,cryptov1-rng";
-+               reg = <0x0 0xff8b8000 0x0 0x1000>;
-+               clocks = <&cru SCLK_CRYPTO1>, <&cru HCLK_S_CRYPTO1>;
-+               clock-names = "clk_crypto", "hclk_crypto";
-+               assigned-clocks = <&cru SCLK_CRYPTO1>, <&cru HCLK_S_CRYPTO1>;
-+               assigned-clock-rates = <150000000>, <100000000>;
-+               status = "okay";
-+       };
++	rng: rng@ff8b8000 {
++		compatible = "rockchip,cryptov1-rng";
++		reg = <0x0 0xff8b8000 0x0 0x1000>;
++		status = "okay";
++	};
 +
-        gpu: gpu@ff9a0000 {
-                compatible = "rockchip,rk3399-mali", "arm,mali-t860";
-                reg = <0x0 0xff9a0000 0x0 0x10000>;
+ 	gpu: gpu@ff9a0000 {
+ 		compatible = "rockchip,rk3399-mali", "arm,mali-t860";
+ 		reg = <0x0 0xff9a0000 0x0 0x10000>;