Fixed the compilation issue due to redeclaration after disabling ble_sm_feature

nimble/host/src/ble_gatts.c

@@ -589,8 +589,9 @@ ble_gatts_calculate_hash(uint8_t *out_hash_key)
     int size;
     int rc;
     uint8_t *buf;
-    uint8_t key[16] = {0};
+    uint8_t key[16];
 
+    memset(key, 0, sizeof(key));
     /* data with all zeroes */
     rc = ble_att_get_database_size(&size);
     if(rc != 0) {

nimble/host/src/ble_sm_priv.h

@@ -433,7 +433,6 @@ int ble_sm_init(void);
 struct ble_l2cap_chan *ble_sm_create_chan(uint16_t handle);
 void *ble_sm_cmd_get(uint8_t opcode, size_t len, struct os_mbuf **txom);
 int ble_sm_tx(uint16_t conn_handle, struct os_mbuf *txom);
-int ble_sm_alg_aes_cmac(const uint8_t *key, const uint8_t *in, size_t len, uint8_t *out);
 
 
 #ifdef __cplusplus