msm: ipa: teth_bridge: fix disconnect sequence

Fixes an issue discovered during USB suspend/resume testing, where
the code requests the BRIDGE_PROD resource while the USB cable is
disconnected. Enables USB suspend/resume.

Change-Id: I4e6829e1fb7b7213e886c9b3b9f83d6647f58c9b
Signed-off-by: Gidon Studinski <gidons@codeaurora.org>