ARM: dts: aspeed: e3c246d4i: Add PECI device

Now that we've got driver support for it, we might as well enable and
use it.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Link: https://lore.kernel.org/r/20230224000400.12226-3-zev@bewilderbeest.net
Signed-off-by: Joel Stanley <joel@jms.id.au>