arm64: dts: ls1043a: add crypto node

LS1043A has a SEC v5.4 security engine.
For now don't add rtic or sec_mon subnodes, since these features
haven't been tested yet.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>