max77759_charger: fix usecase for USB+WLC_TX->USB_DC

The bst-on didn't disabled when changing WLC_TX to 0
in PPS-DC, this cause WLC no response after unplug
PPS_DC.

Bug: 190001436
Signed-off-by: yihsiangpeng <[email protected]>
Change-Id: I929729d846edf96692a8eb5946c957a4b0ced74d
1 file changed