arm64: defconfig: Enable Tegra234 support

Support for Tegra234 was merged in v5.10-rc1, so we might as well enable
it by default.
Signed-off-by: NThierry Reding <treding@nvidia.com>

arch/arm64/configs/defconfig

@@ -958,6 +958,7 @@ CONFIG_ARCH_TEGRA_132_SOC=y
 CONFIG_ARCH_TEGRA_210_SOC=y
 CONFIG_ARCH_TEGRA_186_SOC=y
 CONFIG_ARCH_TEGRA_194_SOC=y
+CONFIG_ARCH_TEGRA_234_SOC=y
 CONFIG_ARCH_K3_AM6_SOC=y
 CONFIG_ARCH_K3_J721E_SOC=y
 CONFIG_TI_SCI_PM_DOMAINS=y