ARM: dts: imx: align name for crypto node and child nodes

crypto node should use the "crypto" generic naming,
and not a specific one ("sahara", "dcp", "caam").

Child nodes of the crypto node for caam crypto engine
should use the "jr" name (without an index),
as indicated in the DT binding.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>