[Bugfix] nRF devices not setting their address from hardware.

Adds a missing macro to enable vendor specific HCI commands to allow reading the harware mac address.

Author: h2zero

src/syscfg/syscfg.h

@@ -1692,6 +1692,10 @@
 #define MYNEWT_VAL_BLE_LL_SYSVIEW (0)
 #endif
 
+#ifndef MYNEWT_VAL_BLE_LL_HCI_VS
+#define MYNEWT_VAL_BLE_LL_HCI_VS (1)
+#endif
+
 #ifndef MYNEWT_VAL_BLE_LL_HCI_VS_EVENT_ON_ASSERT
 #define MYNEWT_VAL_BLE_LL_HCI_VS_EVENT_ON_ASSERT (0)
 #endif