net/bnxt: add helper functions for blob/regfile ops

net/bnxt: add helper functions for blob/regfile ops

1. blob routines for managing key/mask/result data
2. regfile routines for managing temporal data during flow
   construction

Signed-off-by: Mike Baucom <michael.baucom@broadcom.com>
Signed-off-by: Kishore Padmanabha <kishore.padmanabha@broadcom.com>
Signed-off-by: Venkat Duvvuru <venkatkumar.duvvuru@broadcom.com>
Reviewed-by: Lance Richardson <lance.richardson@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>