IB/hfi1: Remove unused HFI1_DO_INIT_ASIC flag

The flag HFI1_DO_INIT_ASIC flag is no longer used.  Remove
the flag and the code that sets it.

Reviewed-by: Mitko Haralanov <mitko.haralanov@intel.com>
Reviewed-by: Easwar Hariharan <easwar.hariharan@intel.com>
Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>