KIAWAH ISLAND, South Carolina, Aug 9 (Reuters) - Former U.S.Open winner Rory McIlroy took advantage of ideal morningconditions to charge into an early tie for the lead inThursday's opening round of the PGA Championship. In dazzling sunshine with light breezes coming in off theocean at Kiawah Island Golf Resort, the Northern Irishmanbirdied four of his first 11 holes to get to four under in ...