soc/tegra: default select TEGRA_TIMER for Tegra210

The tegra timer is necessary for Tegra210 to support CPU idle power-down
state. So select it by default.
Signed-off-by: Joseph Lo <josephl@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

drivers/soc/tegra/Kconfig

@@ -76,6 +76,7 @@ config ARCH_TEGRA_210_SOC
 	select PINCTRL_TEGRA210
 	select SOC_TEGRA_FLOWCTRL
 	select SOC_TEGRA_PMC
+	select TEGRA_TIMER
 	help
 	  Enable support for the NVIDIA Tegra210 SoC. Also known as Tegra X1,
 	  the Tegra210 has four Cortex-A57 cores paired with four Cortex-A53