IB/hfi1: Change QSFP functions to use resource reservation

Remove the mutex guarding each operation in favor the ASIC
resource acquire/release.  Push the resource acquire/release,
above each operation call to allow exclusive access across
multiple operations.

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>