usb: dwc3: Do not drive a pulse on DP for EUD connect event

With the commit 89bf4e6b ("dwc3: Handle USB spoof
disconnect when EUD is enabled") irrespective of the source
of connect event, a pulse is driven on DP in the case where
the device is connected to a CDP.
In this case if the EUD is enabled after the device has
already been enumerated on a CDP it results in a enumeration
failure. Fix this by preventing the driving a pulse on DP
when the connect event in from the EUD.

Change-Id: I31bc4bfd012e98522caefdfc5e8d31af47b7154a
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>