Prima: Do not queue multiple setMaxTxPower cmd in SME pending queue

Currently multiple setMaxTxPower are allowed and thus
if some command is present in sme active queue it
can lead to overflow of the sme pending queue.

Fix is to allow only one setMaxTxPower command at a time
to get processed.

Change-Id: I1c2d21c78bef74fad01ca1010b124c8dd7608fe2
CRs-Fixed: 1107777
diff --git a/CORE/MAC/inc/aniGlobal.h b/CORE/MAC/inc/aniGlobal.h
index 822cf1d..8197357 100644
--- a/CORE/MAC/inc/aniGlobal.h
+++ b/CORE/MAC/inc/aniGlobal.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012-2014, 2016 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2012-2014, 2017 The Linux Foundation. All rights reserved.
  *
  * Previously licensed under the ISC license by Qualcomm Atheros, Inc.
  *
@@ -1090,6 +1090,7 @@
     bool sap_auth_offload;
     uint32_t sap_auth_offload_sec_type;
 #endif /* SAP_AUTH_OFFLOAD */
+   bool max_power_cmd_pending;
 } tAniSirGlobal;
 
 #ifdef FEATURE_WLAN_TDLS