rockchip: rk3399: Enable random generator on all boards

The RK3399 SoC contain a crypto engine block that can generate random
numbers.

Imply DM_RNG and RNG_ROCKCHIP Kconfig options to take advantage of the
random generator on all RK3399 boards. Also remove the unnecessary use
of a status = "okay" prop.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Reviewed-by: Peter Robinson <pbrobinson@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Dragan Simic <dsimic@manjaro.org>
diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
index 7c0116d..f580d69 100644
--- a/arch/arm/mach-rockchip/Kconfig
+++ b/arch/arm/mach-rockchip/Kconfig
@@ -265,12 +265,14 @@
 	imply ARMV8_SET_SMPEN
 	imply BOOTSTD_FULL
 	imply CMD_BOOTCOUNT if BOOTCOUNT_LIMIT
+	imply DM_RNG
 	imply LEGACY_IMAGE_FORMAT
 	imply MISC
 	imply MISC_INIT_R
 	imply OF_LIVE
 	imply PARTITION_TYPE_GUID
 	imply PRE_CONSOLE_BUFFER
+	imply RNG_ROCKCHIP
 	imply ROCKCHIP_COMMON_BOARD
 	imply ROCKCHIP_EFUSE
 	imply ROCKCHIP_SDRAM_COMMON