qcacld-3.0: Fix Set key reorder

Host is processing unicast set key and broadcast
set key requests out of order and plumbing keys
in same order to firmware. This is due to posting
the requests with priority to scheduler thread.

Removed posting message with priority from
API csr_send_mb_set_context_req_msg().

This change partially reverts
commit I31e346da6662ab56f268f94260ed0f169b8f182b

Change-Id: I8705a25bcb2884c4dbc2555e6a58d1bb6987f736
CRs-Fixed: 2260805

core/sme/src/csr/csr_api_roam.c

@@ -16549,7 +16549,7 @@ QDF_STATUS csr_send_mb_set_context_req_msg(tpAniSirGlobal pMac,
 
 		msg.type = eWNI_SME_SETCONTEXT_REQ;
 		msg.bodyptr = pMsg;
-		status = scheduler_post_msg_by_priority(QDF_MODULE_ID_PE, &msg, true);
+		status = scheduler_post_msg(QDF_MODULE_ID_PE, &msg);
 		if (QDF_IS_STATUS_ERROR(status))
 			qdf_mem_free(pMsg);
 	} while (0);