usb: ehci-msm: Fix host mode HUB resume issue

When the micro a cable is connected over hub in system suspend,
hub is suspended and usb entered into low power mode and
system is suspended and went to the deep sleep. if usb device
is connected to the suspended hub then hub is resumed and system
wakeup from deep sleep due to USB event. If the system is in deep
sleep it does not handle the device resume for received USB asynchronous
interrupt and the connected devices are not resumed.

To fix this drive resume signaling in host mode to wakeup peripherals.

CRs-fixed: 654643
Change-Id: I44e4ae1a6f422a4b7ab53f39a367e071e467893d
Signed-off-by: ChandanaKishori Chiluveru <cchilu@codeaurora.org>