MLK-9769-19 Add ARC4-ECB support for CAAM in i.MX6 family

Adds ARC4-ECB Mode support to the CAAM crypto accelerator core in
the i.MX6 family of SoC devices.

Note that CAAM also goes by sec-4.0 or sec-5.0 in other product families (such as QorIQ).
Thus the property names are often tied to the sec-4.0+ nomenclature.

Signed-off-by: Winston Hudson (b45308) <winston.h.hudson@freescale.com>
Signed-off-by: Dan Douglass <dan.douglass@freescale.com>