ARM: config: Enable Tegra SoC Thermal driver

Enable the Tegra SoC Thermal driver that is used by Tegra124 platforms
to be built as a module by default for ARM tegra_defconfig and
multi_v7_defconfig builds.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>