usb: misc: Fix redriver chipset disable issue for DP only cable

USB host stack will be turned off if peer doesn't support USB
communication when in certain condition. PD driver will send
id notification when disable host stack. This lead to re-driver
chipset is disabled.

Disable redriver chipset only when in USB only mode. When Type
C to DP only cable is plug out, SW side will receive DP lane
change notification and change back to USB only mode, in that
case, re-driver chipset will be disabled.

Change-Id: Ice34caedcd658164837d85eef436740b163af5dd
Signed-off-by: Liangliang Lu <luliang@codeaurora.org>