msm: ipa3: Remove ep_delay on disconnect sequence

When device in Low Power Mode, usb driver invokes
suspend and then disconnect upon cable disconnection.
Remove the ep delay if it is set.

Change-Id: I203d57d70e8c189a2f3bc7f7830392fac98cfbb1
Signed-off-by: Mohammed Javid <mjavid@codeaurora.org>