crypto: caam - Added property fsl,sec-era in SEC4.0 device tree binding.

This new property defines the era of the particular SEC version.
The compatible property in device tree "crypto" node has been updated
not to contain SEC era numbers.

Signed-off-by: Vakul Garg <vakul@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>