Hock Tan, CEO of Broadcom (L) and former CEO of Intel, Pat Gelsinger.Reuters | CNBCIt was a big year for silicon in Silicon Valley — but a brutal one for the company most responsible for the area's moniker.Intel, the 56-year-old chipmaker co-founded by industry pioneers Gordon Moore and Robert Noyce and legendary investor Arthur Rock, had its worst year since going public in 1971, losing 61% of its value.The opposite story unfolded at Broadcom, the chip conglomerate run by CEO Hock Tan and headq...