USB: phy-msm-qusb-v2: Enable autoresume only when device is connected

Currently driver is enabling autoresume feature even if no device is
connected which is not required. Hence enable auto resume only when
any HS/FS/LS devices are connected during bus suspend.

Change-Id: Id02a357597dde64fe4026ccaacf73bf3abd4b565
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>