Modified K66F flash ld file to only use one RAM memory region.
Modified K66F flash ld file to only use one RAM memory region.

- This prevents issues with running out of RAM while linking.
- It's possible that an object could straddle the 0x2000_0000 RAM region
  boundary, but as long as only aligned accesses are used there should
  be no problems.

flit/modular,flit/modular,flit/modular,flit/modular,flit/modular