linux-imx

MGS-5536-2 [#imx-1962] fix MMU shift mapping for 4GB truncated mtlb

MMU enable shift mapping for the reserved memory from 4GB above range,
4GB above address is truncated for mtlb offset falling into dynamic area,

need check shift mapping to avoid dynamic error for the truncated mtlb.

Signed-off-by: Xianzhong <xianzhong.li@nxp.com>