arm64: defconfig: Do not disable Tegra AHB driver

This driver is enabled by default on Tegra because it is needed by the
drivers for a number of peripherals.

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

arch/arm64/configs/defconfig

@@ -77,7 +77,6 @@ CONFIG_BPF_JIT=y
 # CONFIG_WIRELESS is not set
 CONFIG_NET_9P=y
 CONFIG_NET_9P_VIRTIO=y
-# CONFIG_TEGRA_AHB is not set
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y