armv7: ls102xa: cci-400: Enable snoop and DVM message requests.

Enable snoop and DVM message on all CCI-400 slave ports. Setting
on disabled feature (snoop or DVM) is ignored by CCI-400.

Signed-off-by: Yuan Yao <yao.yuan@freescale.com>
[York Sun: Add commit message]
Reviewed-by: York Sun <yorksun@freescale.com>