[FEATURE] Easier/scalable way to resize memory maps

[cujomalainey]

Is your feature request related to a problem? Please describe. Resizing memory regions to fit various use cases is not trivial in the current implementation nor is it "configurable" in the sense that you can multiple layouts and easily pick from them

Describe the solution you'd like We need to first split the device memory layout from the region layout, then provide a configurable way to size the regions

Describe alternatives you've considered N/A, current method is a pain and hard to understand

Additional context No idea what/how zephyr is going to affect this problem, might already be solved by the system

[cujomalainey]

@lkoenig FYI

[lgirdwood]

Zephyr allocator should fix this.