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By Noel Randewich SAN FRANCISCO/BARCELONA (Reuters) – The worlds biggest mobile brands will jostle for the spotlight at the premier mobile industry event this week in Spain, but away from the glitzy displays chipmakers will be preoccupied with China, the largest mobile market on the planet. From Qualcomm and Intel to MediaTek, Marvell and Broadcom, the suppliers of the crucial components that power smartphone applications and drive high-speed wireless connections are scrambling to capitalize on opportunities taking shape as Chinese brands and telecoms carriers such as China Mobile gear up for 4G LTE, or Long-Term Evolution. Chinas move to LTE, a standard now adopted mostly in the United States, gives Intel and other chipmakers a unique chance to knock dominant LTE chip supplier Qualcomm off its perch.