ENGR00230538-2: CAAM: Add Secure Memory and SNVS properties

ENGR00230538-2: CAAM: Add Secure Memory and SNVS properties

Add Secure Memory and SNVS properties to MX6 configuration.

Previous configurations of MX6 platform device definition lacked
specific propeties for CAAM Secure Memory and SNVS. Added these
properties to define register ranges for both entities.

Also corrected the name for the offset of the address range for
CAAM Secure Memory to more accurately reflect it's purpose.

Signed-off-by: Steve Cornelius <steve.cornelius@freescale.com>
Signed-off-by: Terry Lv <r65388@freescale.com>