msm: ipa: Fix to notify modem about usb_disconnect

When USB is disconnected, make changes to send clear_data_path
request to modem to make sure flow is not disabled.
If flow is disabled, ZLT will not be processed by IPA and
it results in a panic.

Change-Id: I2ff2014e9adeb3d7ee726b3b4055e498ca4be7ab
Acked-by: Chaitanya Pratapa <cpratapa@qti.qualcomm.com>
Signed-off-by: Ravinder Konka <rkonka@codeaurora.org>