Summary
1. add Protected build Support for ARM MPS AN500
2. refine mps Memory layout configure and enable MPU support
Note
1. ostest for an547:nsh
2. ostest for an500:nsh and an500:knsh
Signed-off-by: qinwei1 <qinwei1@xiaomi.com>
Signed-off-by: ligd <liguiding1@xiaomi.com>