extcon: intel-cht-wc: Make charger detection co-existed with OTG host mode

Whiskey Cove Cherry Trail PMIC requires disabling OTG host mode before
of charger detection procedure. Do this by manipulationg of CHGRCTRL1
register.

Source: APCI DSDT code of Lenovo Yoga Book YB1-X91L and open-sourced
Intel's drivers.

Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>