bangkk select the max current is beyond the sourcecap pdo. Optimize the pdo max current when the pd power is lower than 18W. Change-Id: Iaded43336951bcfbd9620d45a89c3517ccd058a9 Signed-off-by: Lei Chen <chenlei18@lenovo.com> Reviewed-on: https://gerrit.mot.com/2638964 SME-Granted: SME Approvals Granted SLTApproved: Slta Waiver Tested-by: Jira Key Reviewed-by: Xiangpo Zhao <zhaoxp3@motorola.com> Reviewed-by: Lei Chen <chenl18@motorola.com> Submit-Approved: Jira Key