usb: xhci-msm-hsic: Add resume gpio support

Some peripherals connected to hsic controller cannot wakeup from
low power mode using in-band bus resume signalling. If present,
use resume gpio to bring peripherals out of low power mode before
resuming the bus. Also change replace msleep to usleep_range when
driving resume onto the bus.

CRs-Fixed: 613194
Change-Id: I8e2a5b26195521a03891c271e9371cc65ddf07ee
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>