qcacmn: Increase the DBR_NUM_RESP_PER_EVENT to 2

Increase the number of repsonses per dbr event to 2 to
support Spectral scan in 160MHz mode

Change-Id: I47ee933b06d94a9a02f7d448b631dfdb99e297c4
CRs-Fixed: 2297498

target_if/direct_buf_rx/src/target_if_direct_buf_rx_main.h

@@ -28,7 +28,7 @@ struct direct_buf_rx_data;
 
 #define DBR_RING_BASE_ALIGN 8
 #define DBR_EVENT_TIMEOUT_IN_MS 1
-#define DBR_NUM_RESP_PER_EVENT 1
+#define DBR_NUM_RESP_PER_EVENT 2
 
 /**
  * enum DBR_MODULE - Enum containing the modules supporting direct buf rx