Fix build with esp32c2

Author: h2zero

src/nimble/nimble/host/src/ble_sm_alg.c

@@ -614,12 +614,14 @@ ble_sm_alg_gen_dhkey(const uint8_t *peer_pub_key_x, const uint8_t *peer_pub_key_
 }
 #endif
 
+#if !CONFIG_BT_LE_CONTROLLER_NPL_OS_PORTING_SUPPORT
 /* based on Core Specification 4.2 Vol 3. Part H 2.3.5.6.1 */
 static const uint8_t ble_sm_alg_dbg_priv_key[32] = {
     0x3f, 0x49, 0xf6, 0xd4, 0xa3, 0xc5, 0x5f, 0x38, 0x74, 0xc9, 0xb3, 0xe3,
     0xd2, 0x10, 0x3f, 0x50, 0x4a, 0xff, 0x60, 0x7b, 0xeb, 0x40, 0xb7, 0x99,
     0x58, 0x99, 0xb8, 0xa6, 0xcd, 0x3c, 0x1a, 0xbd
 };
+#endif
 
 #if MYNEWT_VAL(BLE_SM_SC_DEBUG_KEYS)
 static const uint8_t ble_sm_alg_dbg_pub_key[64] = {