usb: gadget: keep udc alive on non-std charger det

usb: gadget: keep udc alive on non-std charger det

The non-std charger could also be a self-powered
hub(which is not yet connected to any host).
If we stop controller here, tegra can't detect
the host through this self-powered hub.

Bug 1458990

Change-Id: Ifd4aeae65304acf724098b452899dd5c5a8aac62
Signed-off-by: Petlozu Pravareshwar <petlozup@nvidia.com>
Reviewed-on: http://git-master/r/395217
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Rakesh Babu Bodla <rbodla@nvidia.com>
Reviewed-by: Venkat Moganty <vmoganty@nvidia.com>