qcacld-3.0: Populate max Tx power in Assoc request if reg power is more

For some channels, Reg power is more than MAX supported TX power.
Driver should not populate max tx power more than 22.

Change-Id: I52557bd0c38c128c09b255b46f7d43986d50feff
CRs-Fixed: 2010014

core/sme/src/csr/csr_api_roam.c

@@ -14353,7 +14353,7 @@ QDF_STATUS csr_send_join_req_msg(tpAniSirGlobal pMac, uint32_t sessionId,
 		 */
 		pwrLimit = csr_get_cfg_max_tx_power(pMac,
 					pBssDescription->channelId);
-		if (0 != pwrLimit)
+		if (0 != pwrLimit && pwrLimit < MAX_TX_PWR_CAP)
 			csr_join_req->powerCap.maxTxPower = pwrLimit;
 		else
 			csr_join_req->powerCap.maxTxPower = MAX_TX_PWR_CAP;