net/bnxt: modify HWRM command to create reps

net/bnxt: modify HWRM command to create reps

Use cfa pair alloc for configuring reps.
Instead of cfa_vfr_alloc for Wh+ and cfa_pair_alloc for Stingray,
converge to cfa_pair_alloc/free for both devices. Set the command
request structure bits accordingly.
As part of this, remove the old cfa_vfr_alloc cmd definitions as FW
has deprecated support for those commands.

Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Shahaji Bhosle <sbhosle@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>