CHROMIUM: config: arm64: dragon: enable TEGRA_THERM_EST

Enable TEGRA_THERM_EST in arm64 dragon_defconfig.

BUG=chrome-os-partner:39762
TEST=tegra_therm_est driver can be built.

Change-Id: I285fa1992c33cc4361dd63e16c4cce381aa8fde9
Signed-off-by: Wei Ni <wni@nvidia.com>
Reviewed-on: https://chromium-review.googlesource.com/275175
Reviewed-by: Benson Leung <bleung@chromium.org>
Reviewed-by: Puneet Kumar <puneetster@chromium.org>
Commit-Queue: Puneet Kumar <puneetster@chromium.org>
Tested-by: Puneet Kumar <puneetster@chromium.org>
diff --git a/arch/arm64/configs/dragon_defconfig b/arch/arm64/configs/dragon_defconfig
index da17d61..135d539 100644
--- a/arch/arm64/configs/dragon_defconfig
+++ b/arch/arm64/configs/dragon_defconfig
@@ -336,6 +336,7 @@
 CONFIG_THERMAL_DEFAULT_GOV_PD=y
 CONFIG_MAX77620_THERMAL=y
 CONFIG_TEGRA210_SOCTHERM=y
+CONFIG_TEGRA_THERM_EST=y
 CONFIG_TEGRA_DFLL_THERMAL_REACTION=y
 CONFIG_TEGRA_THERMAL_THROTTLE=y
 CONFIG_WATCHDOG=y