sbmcharger:optimize the pdo select

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

drivers/power/mmi-smbcharger-iio/mmi-smbcharger-iio.c

@@ -2431,7 +2431,7 @@ static void mmi_chrg_usb_vin_pd_config(struct smb_mmi_charger *chg, int vbus_mv)
 				&& chg->mmi_pdo_info[i].uv_max >= MICRO_5V) {
 				req_pdo = chg->mmi_pdo_info[i].pdo_pos;
 				req_pd_volt = chg->mmi_pdo_info[i].uv_max;
-				req_pd_curr =  (chg->pd_power_max / (req_pd_volt / 1000)) * 1000;
+				req_pd_curr =  min((chg->pd_power_max / (req_pd_volt / 1000)) * 1000,chg->mmi_pdo_info[i].ua);
 				fixed_active = true;
 			}
 		}