ARM: HYP/non-sec: add the pen address BE mode support.

For some SoCs, the pen address register maybe in BE mode and the
CPUs are in LE mode.

This patch adds BE mode support for smp pen address.

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>