bnxt_re: Make room for mapping beyond 32 entries

Latest chip requires indexes 32 to 47 be used for the internal HW block
that manages queue mapping.

Signed-off-by: Devesh Sharma <devesh.sharma@broadcom.com>
Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>