arm64: defconfig: enable TSN features for ENETC and similiar hardware

arm64: defconfig: enable TSN features for ENETC and similiar hardware

Newer network cards and switches support offloading of certain packet
scheduling, classifying and actions onto the hardware itself. For
example, time-aware and credit based schedulers. To use this feature we
have to enable the corresponding modules. Please note, that this will
also enable NET_SCHED and NET_CLS_ACT as builtin because there is no
module option. The enabled modules should get us a good foundation.

$ scripts/bloat-o-meter old-vmlinux vmlinux
add/remove: 446/215 grow/shrink: 48/31 up/down: 78445/-11519 (66926)
[..]
Total: Before=20452567, After=20519493, chg +0.33%

Link: https://lore.kernel.org/r/20200707223114.16355-1-michael@walle.cc
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>