BLE: Set the number of the advertising sets supported by the host to 3.

Author: pan-

features/FEATURE_BLE/targets/TARGET_CORDIO/stack/cordio_stack/ble-host/sources/stack/cfg/cfg_stack.h

@@ -86,7 +86,7 @@ extern "C" {
 
 /*! \brief Number of supported advertising sets: must be set to 1 for legacy advertising */
 #ifndef DM_NUM_ADV_SETS
-#define DM_NUM_ADV_SETS          1
+#define DM_NUM_ADV_SETS          3
 #endif
 
 /*! \brief Number of scanner and initiator PHYs (LE 1M, LE 2M and LE Coded): must be set to 1 for