** Intel INTC.O shares jump 6% to $25 in premarket trading, following a $2 bln investment from Japan's SoftBank Group 9984.T
** Investment seen as strong endorsement of Intel's efforts to revive its chipmaking business and regain tech leadership
** SoftBank to become sixth-largest Intel shareholder, according to LSEG data
** Co won't seek a board seat or commit to buying Intel chips, says source
** Intel CEO Lip-Bu Tan thanks SoftBank CEO Masayoshi Son for backing; Tan previously served on SoftBank's board
** Deal follows reports that the U.S. government may buy a stake in Intel, after Tan's meeting with President Trump
** SoftBank shares fall almost 5% in Tokyo; Intel gains as investors welcome fresh capital amid turnaround efforts
** INTC up ~18% YTD