net/bnxt: modify ULP mapper to use TCAM search

net/bnxt: modify ULP mapper to use TCAM search

Modified ulp mapper to use the new tf_search_tcam_entry API.
When search before allocation is requested, mapper calls
tc_search_tcam_entry with the alloc flag.

- On HIT, the result and tcam index is returned.
- On MISS, the tcam index is returned but the result is
created and the tcam entry is set.
- On REJECT, the flow request is rejected.

Signed-off-by: Mike Baucom <michael.baucom@broadcom.com>
Reviewed-by: Kishore Padmanabha <kishore.padmanabha@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>