configs: rock-pi-4: Enable rockchip efuse support

Enable efuse support for reading the cpuid#, serial# and generate a
board unique mac address

Signed-off-by: Sjoerd Simons <sjoerd@collabora.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/configs/rock-pi-4c-rk3399_defconfig b/configs/rock-pi-4c-rk3399_defconfig
index ac045d1..6f5e866 100644
--- a/configs/rock-pi-4c-rk3399_defconfig
+++ b/configs/rock-pi-4c-rk3399_defconfig
@@ -31,6 +31,7 @@
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_ROCKCHIP_GPIO=y
+CONFIG_ROCKCHIP_EFUSE=y
 CONFIG_SYS_I2C_ROCKCHIP=y
 CONFIG_MISC=y
 CONFIG_MMC_DW=y