IB/hfi1: Fix unbalanced braces around else

Add missing braces around else blocks in a few places to make checkpatch
happy.

Fixes: 77241056 ("IB/hfi1: add driver files")
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>