ARM: multi_v7_defconfig: Enable Tegra cpuidle driver

The Tegra CPU Idle driver was moved out into driver/cpuidle/ directory and
it is now a proper platform driver.
Acked-by: NPeter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NDmitry Osipenko <digetx@gmail.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>

arch/arm/configs/multi_v7_defconfig

@@ -113,6 +113,7 @@ CONFIG_CPU_IDLE=y
 CONFIG_ARM_CPUIDLE=y
 CONFIG_ARM_ZYNQ_CPUIDLE=y
 CONFIG_ARM_EXYNOS_CPUIDLE=y
+CONFIG_ARM_TEGRA_CPUIDLE=y
 CONFIG_KERNEL_MODE_NEON=y
 CONFIG_RASPBERRYPI_FIRMWARE=y
 CONFIG_TRUSTED_FOUNDATIONS=y