ARM: tegra_defconfig: Enable CONFIG_DEVFREQ_THERMAL

Memory-related Tegra devfreq devices now could be used as a cooling
devices. Enable CONFIG_DEVFREQ_THERMAL by default since this option
enables cooling functionality of the devfreq drivers.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/configs/tegra_defconfig

@@ -167,6 +167,7 @@ CONFIG_SENSORS_LM95245=y
 CONFIG_THERMAL=y
 CONFIG_THERMAL_STATISTICS=y
 CONFIG_CPU_THERMAL=y
+CONFIG_DEVFREQ_THERMAL=y
 CONFIG_TEGRA_SOCTHERM=m
 CONFIG_WATCHDOG=y
 CONFIG_MAX77620_WATCHDOG=y