rockchip: rk3368-lion: switch to use ARM generic timer

Default to use ARM generic timer in ARM64, switch from
rk timer to generic timer.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/rk3368-lion-u-boot.dtsi b/arch/arm/dts/rk3368-lion-u-boot.dtsi
index fb4a4fb..edc93e4 100644
--- a/arch/arm/dts/rk3368-lion-u-boot.dtsi
+++ b/arch/arm/dts/rk3368-lion-u-boot.dtsi
@@ -12,7 +12,6 @@
 	chosen {
 		stdout-path = "serial0:115200n8";
 		u-boot,spl-boot-order = &emmc, &sdmmc;
-		tick-timer = "/timer@ff810000";
 	};
 
 };
diff --git a/configs/lion-rk3368_defconfig b/configs/lion-rk3368_defconfig
index ff3255b..2c4e11c 100644
--- a/configs/lion-rk3368_defconfig
+++ b/configs/lion-rk3368_defconfig
@@ -88,10 +88,6 @@
 CONFIG_DEBUG_UART_SKIP_INIT=y
 CONFIG_ROCKCHIP_SPI=y
 CONFIG_SYSRESET=y
-CONFIG_TIMER=y
-CONFIG_SPL_TIMER=y
-CONFIG_TPL_TIMER=y
-CONFIG_ROCKCHIP_TIMER=y
 CONFIG_USE_TINY_PRINTF=y
 CONFIG_SPL_TINY_MEMSET=y
 CONFIG_LZO=y