usb: gadget: tegra: reset extcon state in cable disconnect

usb: gadget: tegra: reset extcon state in cable disconnect

For QC2.0 charger we set two cable types. Resetting the
extcon state during cable disconnect so that all the
cables types are cleared.

Bug 200011709

Change-Id: I3e5bf896869045f5eefb68723411abbc864ae76d
Signed-off-by: Rakesh Bodla <rbodla@nvidia.com>
Reviewed-on: http://git-master/r/422715
(cherry picked from commit b546521e81a106c1aea35d3198fc135b67e64913)
Reviewed-on: http://git-master/r/423473
GVS: Gerrit_Virtual_Submit
Reviewed-by: Venkat Moganty <vmoganty@nvidia.com>