Intel Cancels Plan to Enter Digital TV Chip Market  SAN FRANCISCO (Reuters) - Intel Corp. &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=INTC.O qtype=sym infotype=info qcat=news"&gt;INTC.O&lt;/A&gt; on Thursday  said it has canceled its plan to enter the digital television  chip business, marking a major retreat from an initiative that  was intended to broaden the computer chip maker's market focus.