msm_fb: fbram: Use newer method of allocating RAM to fb

Eliminates the need for specifying a base address for the framebuffer RAM allocation.

credit: sultanxda
shooteru: Cleanup PMEM SF & ION HEAPS

credit: sultanxda
shooteru: ION: Various updates

*Clean out more useless PMEM
*Remove ION rotator heap
*Allocate surfaceflinger ION heap statically with a base address (PMEM heaps are static so the other heaps should be static too in order to prevent any issues)

credit:sultanxda