microbit: Promote constants in MicroBitBLEManager to .h file

Moved configuration constants from .cpp to .h file, so that they can be reused
more easily from other code, such as the broadcast radio code.

inc/MicroBitBLEManager.h

@@ -39,6 +39,11 @@
 #define MICROBIT_BLE_PAIR_SUCCESSFUL            0x08
 
 #define MICROBIT_BLE_PAIRING_TIMEOUT	        90
+#define MICROBIT_BLE_POWER_LEVELS               8
+#define MICROBIT_BLE_MAXIMUM_BONDS              4
+#define MICROBIT_BLE_ENABLE_BONDING 	        true
+#define MICROBIT_BLE_REQUIRE_MITM		        true
+extern const int8_t MICROBIT_BLE_POWER_LEVEL[];
 
 /**
   * Class definition for the MicroBitBLEManager.

source/ble-services/MicroBitBLEManager.cpp

@@ -21,13 +21,7 @@
 #pragma GCC diagnostic pop
 #endif
 
-#define MICROBIT_BLE_ENABLE_BONDING 	true
-#define MICROBIT_BLE_REQUIRE_MITM		true
-
 #define MICROBIT_PAIRING_FADE_SPEED		4
-#define MICROBIT_BLE_POWER_LEVELS       8
-#define MICROBIT_BLE_MAXIMUM_BONDS      4
-
 
 const char* MICROBIT_BLE_MANUFACTURER = "The Cast of W1A";
 const char* MICROBIT_BLE_MODEL = "BBC micro:bit";