SAN FRANCISCO :Qualcomm on Wednesday announced a suite of new chips for PCs and phones, including a PC chip with a new security feature for businesses that analysts say is likely the first of its kind. San Diego-based Qualcomm is one of the world's biggest sellers of the chips at the heart of mobile phones, connecting them to wireless data networks. But for the past two years, the company has been pushing into the PC market, where it competes against Apple to sell energy-efficient chips for