misc-habanalabs-fixes-2019-06-06

- Fix the code that checks whether we can use 2MB page size when mapping
  memory in the ASIC's MMU. The current code had a "hole" which happened
  in architectures other then x86-64.

- Fix the debugfs interface to read/write from/to the device using device
  virtual addresses. There was a bug in the translation regarding
  addresses that were mapped using 2MB page size.

- Fix a bug in the debug/profiling code, where the code didn't read the
  full address but only the lower 32-bits of the address.