IB/hfi1: Remove reference to RHF.VCRCErr

The bit VCRCErr in the receive header flag is actually a
reserved field. Remove bit operations on this field.

Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: John Fleck <john.fleck@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>