NimBLE: Fix build failures due to non static declarations in RPA feature

Closes IDFGH-2891

nimble/host/src/ble_hs_priv.h

@@ -129,11 +129,6 @@ void ble_hs_notifications_sched(void);
 struct ble_npl_eventq *ble_hs_evq_get(void);
 void ble_hs_stop_init(void);
 
-int
-ble_sm_alg_encrypt(const uint8_t *key, const uint8_t *plaintext,
-                   uint8_t *enc_data);
-
-
 struct ble_mqueue {
     STAILQ_HEAD(, os_mbuf_pkthdr) head;
     struct ble_npl_event ev;

nimble/host/src/ble_hs_resolv_priv.h

@@ -37,8 +37,10 @@ struct ble_hs_resolv_entry {
     uint8_t rl_peer_rpa[BLE_DEV_ADDR_LEN];
 };
 
+#if MYNEWT_VAL(BLE_STORE_CONFIG_PERSIST)
 /* Persist peer records in NVS. XXX Need to handle this in `store` module */
 int ble_store_persist_peer_records(void);
+#endif
 
 struct ble_hs_peer_sec {
     ble_addr_t peer_addr;

nimble/host/src/ble_sm_priv.h

@@ -395,6 +395,8 @@ int ble_sm_slave_initiate(uint16_t conn_handle);
 int ble_sm_enc_initiate(uint16_t conn_handle, uint8_t key_size,
                         const uint8_t *ltk, uint16_t ediv,
                         uint64_t rand_val, int auth);
+int ble_sm_alg_encrypt(const uint8_t *key, const uint8_t *plaintext,
+                       uint8_t *enc_data);
 int ble_sm_init(void);
 #else
 
@@ -411,6 +413,9 @@ int ble_sm_init(void);
 
 #define ble_sm_init() 0
 
+#define ble_sm_alg_encrypt(key, plaintext, enc_data) \
+        BLE_HS_ENOTSUP
+
 #endif
 
 struct ble_l2cap_chan *ble_sm_create_chan(uint16_t handle);