rockchip: rk3308: Generate ethaddr based on cpu id

Like other Rockchip SoCs the RK3308 has cpu id programmed into OTP
memory. The rockchip_otp driver already support the RK3308 variant.
However, the device tree is missing a node to enable use of OTP.

Add the missing otp node to soc u-boot.dtsi, enable the rockchip_otp
driver and enable use of misc_init_r() to set ethaddr based on cpu id.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

arch/arm/dts/rk3308-u-boot.dtsi

@@ -10,6 +10,22 @@
 		mmc0 = &emmc;
 		mmc1 = &sdmmc;
 	};
+
+	otp: nvmem@ff210000 {
+		compatible = "rockchip,rk3308-otp";
+		reg = <0x0 0xff210000 0x0 0x4000>;
+		clocks = <&cru SCLK_OTP_USR>, <&cru PCLK_OTP_NS>,
+			 <&cru PCLK_OTP_PHY>;
+		clock-names = "otp", "apb_pclk", "phy";
+		resets = <&cru SRST_OTP_PHY>;
+		reset-names = "phy";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		cpu_id: id@7 {
+			reg = <0x07 0x10>;
+		};
+	};
 };
 
 &cru {

arch/arm/mach-rockchip/Kconfig

@@ -163,7 +163,10 @@ config ROCKCHIP_RK3308
 	imply ARMV8_CRYPTO
 	imply ARMV8_SET_SMPEN
 	imply LEGACY_IMAGE_FORMAT
+	imply MISC
+	imply MISC_INIT_R
 	imply ROCKCHIP_COMMON_BOARD
+	imply ROCKCHIP_OTP
 	imply SPL_CLK
 	imply SPL_FIT_SIGNATURE
 	imply SPL_RAM