@param context - sender context, to match reply w/ request
@param bi_tbl_id - The BIER table-id used to forward post encap
@param bi_src - The source Bit-position in the encap.
- @param bi_n_bytes - The number of bytes in the following bit-string
+ @param bi_n_bytes - The number of bytes in the following bit-string.
+ VPP only supports BSL of 1024 and less, so this is
+ a u8 field.
@param bi_bytes - The bit-string represented as a byte array (MSB first)
*/
define bier_imp_add