usb: phy: tegra: Report USB_EVENT_ID_FLOAT event

usb: phy: tegra: Report USB_EVENT_ID_FLOAT event

Report USB_EVENT_ID_FLOAT event when there is a disconnect
of OTG cable is disconnected. USB_EVENT_NONE should be used
for charger disconnect.

Bug 1623322
Bug 1615853

Change-Id: I7ecad33da453667c28702bb93441cbb631d2b3f9
Signed-off-by: Rohith Seelaboyina <rseelaboyina@nvidia.com>
Reviewed-on: http://git-master/r/717708
Reviewed-by: Venkat Moganty <vmoganty@nvidia.com>
Tested-by: Venkat Moganty <vmoganty@nvidia.com>
Reviewed-on: http://git-master/r/807522
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Ajay Gupta <ajayg@nvidia.com>
Tested-by: Ajay Gupta <ajayg@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Ashutosh Jha <ajha@nvidia.com>