Add bindings for the Inside Secure SafeXcel EIP-93 crypto engine. The IP is present on Airoha SoC and on various Mediatek devices and other SoC under different names like mtk-eip93 or PKTE. All the compatible that currently doesn't have any user are defined but rejected waiting for an actual device that makes use of them. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>