Revert "power: pm8921-charger: enable unplug_check for PC USB"

This reverts commit 4fa0eb8ca5cf0eb9b0f5c01cd20e0ee50fa2c853

Change-Id: I16d5e60d436750ce65cd41ec0607df439f886d7f
diff --git a/drivers/power/pm8921-charger.c b/drivers/power/pm8921-charger.c
index a169b4f..0db0b6f 100644
--- a/drivers/power/pm8921-charger.c
+++ b/drivers/power/pm8921-charger.c
@@ -2728,6 +2728,11 @@
 				pr_info("usb_now=%d, usb_target = %d\n",
 					usb_ma, 500);
 				goto check_again_later;
+			} else if (usb_ma == 500) {
+				pr_info("Stopping Unplug Check Worker"
+					 " USB == 500mA\n");
+				disable_input_voltage_regulation(chip);
+				return;
 			}
 
 			if (usb_ma <= 100) {