qcacld-3.0: Update negotiated maxTxPower in Assoc request

qcacld-2.0 to qcacld-3.0 propagation

On some channel, AP's tranmission power is less than
regulatory tx power as per db.txt. While sending Assoc request,
driver should populate negotiated power (min power of AP's tx power and
regulatory power for operating channel) in Assoc request.
This doesn't happen currently, fix it to ensure that
driver follow negotiated power.

Change-Id: I7755894b72e4f0f7ffc371abbbda5c75b2851b13
CRs-Fixed: 2011396

core/mac/src/pe/lim/lim_process_sme_req_messages.c

@@ -1887,6 +1887,12 @@ __lim_process_sme_join_req(tpAniSirGlobal mac_ctx, uint32_t *msg_buf)
 		pe_debug("Reg max %d local power con %d max tx pwr %d",
 			reg_max, local_power_constraint, session->maxTxPower);
 
+		if (sme_join_req->powerCap.maxTxPower > session->maxTxPower) {
+			sme_join_req->powerCap.maxTxPower = session->maxTxPower;
+			pe_debug("Update MaxTxPower in join Req to %d",
+				sme_join_req->powerCap.maxTxPower);
+		}
+
 		if (session->gLimCurrentBssUapsd) {
 			session->gUapsdPerAcBitmask =
 				session->pLimJoinReq->uapsdPerAcBitmask;