wlan: Add SNR monitoring support

Add support to retrieve SNR from the received frame
and return it to the user space.

CRs-Fixed: 529156
Change-Id: Ic63c41e6bc2d9402dc42554e96637dd829a59a53
diff --git a/CORE/MAC/inc/wniApi.h b/CORE/MAC/inc/wniApi.h
index 65aa11d..4c4a709 100644
--- a/CORE/MAC/inc/wniApi.h
+++ b/CORE/MAC/inc/wniApi.h
@@ -246,6 +246,7 @@
     eWNI_SME_UPDATE_NOA,
     eWNI_SME_CLEAR_DFS_CHANNEL_LIST,
     eWNI_SME_PRE_CHANNEL_SWITCH_FULL_POWER,
+    eWNI_SME_GET_SNR_REQ,
     //General Power Save Messages
     eWNI_PMC_MSG_TYPES_BEGIN,
     eWNI_PMC_PWR_SAVE_CFG,