Refactor include directives to use different paths for arduino/idf.

* Sets macros to allow compiling when Central role is enabled and Observer disabled, or Peripheral enabled and Broadcaster disabled.

* Adds a macro definition for CONFIG_NIMBLE_CPP_IDF to enable different include paths/functionality for IDF / Arduino.

src/NimBLEAdvertising.h

@@ -14,13 +14,15 @@
 
 #ifndef MAIN_BLEADVERTISING_H_
 #define MAIN_BLEADVERTISING_H_
-#include "sdkconfig.h"
-#if defined(CONFIG_BT_ENABLED)
-
 #include "nimconfig.h"
-#if defined(CONFIG_BT_NIMBLE_ROLE_BROADCASTER)
+#if defined(CONFIG_BT_ENABLED) && defined(CONFIG_BT_NIMBLE_ROLE_BROADCASTER)
 
+#if defined(CONFIG_NIMBLE_CPP_IDF)
 #include "host/ble_gap.h"
+#else
+#include "nimble/nimble/host/include/host/ble_gap.h"
+#endif
+
 /****  FIX COMPILATION ****/
 #undef min
 #undef max
@@ -132,6 +134,5 @@ private:
     std::vector<uint8_t>    m_uri;
 };
 
-#endif // #if defined(CONFIG_BT_NIMBLE_ROLE_PERIPHERAL)
-#endif /* CONFIG_BT_ENABLED */
+#endif /* CONFIG_BT_ENABLED && CONFIG_BT_NIMBLE_ROLE_BROADCASTER */
 #endif /* MAIN_BLEADVERTISING_H_ */