smp_keys simplification

};

typedef uint8_t tSMP_BR_STATE;

/* random and encrption activity state */

enum {

  SMP_GEN_COMPARE = 1,

  SMP_GEN_CONFIRM,

  SMP_GEN_DIV_LTK,

  SMP_GEN_DIV_CSRK,

  SMP_GEN_RAND_V,

  SMP_GEN_TK,

  SMP_GEN_SRAND_MRAND,

  SMP_GEN_SRAND_MRAND_CONT,

  SMP_GENERATE_PRIVATE_KEY_0_7,

  SMP_GENERATE_PRIVATE_KEY_8_15,

  SMP_GENERATE_PRIVATE_KEY_16_23,

  SMP_GENERATE_PRIVATE_KEY_24_31,

  SMP_GEN_NONCE_0_7,

  SMP_GEN_NONCE_8_15

};

enum {

  SMP_KEY_TYPE_TK,

  SMP_KEY_TYPE_CFM,

  BT_OCTET16 csrk; /* storage for local CSRK */

  uint16_t ediv;

  BT_OCTET8 enc_rand;

  uint8_t rand_enc_proc_state;

  uint8_t addr_type;

  BD_ADDR local_bda;

  bool is_pair_cancel;