net/bnxt: support Thor WC TCAM

net/bnxt: support Thor WC TCAM

1. Add set/get/free/alloc for WC TCAM
2. Rework the key size in slice management.
3. Add 3 FKB WC keys for WC TCAM set cli cmd
4. Add transform key function for WC TCAM FKB key
5. Add checking for key buffer length for get_tcam

Signed-off-by: Jay Ding <jay.ding@broadcom.com>
Signed-off-by: Randy Schacher <stuart.schacher@broadcom.com>
Signed-off-by: Venkat Duvvuru <venkatkumar.duvvuru@broadcom.com>
Reviewed-by: Farah Smith <farah.smith@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>