move libmm/libcpu shared files to libbsp

[Hesham Moustafa]

Hi,

Currently libmm have a routine implemented at libcpu/arm/shared
Since libcpu maybe deprecated soon, I'd like to ask whether I should
move this implementation to libbsp files or not. This function just
apply protection attributes for a memory region dynamically. What may
be the best directory to place this implementation at ?

Thanks,
Hesham