usb: dwc3: Fix re-enumeration of connected peripherals

When the device exits suspend/deep sleep in host mode with
peripherals connected, the peripherals and root hub failed to
resume because the xhci stack has not resumed yet, leading to
the re-enumeration of the connected peripherals.

Fix this by resuming the glue driver, core and xhci plat driver
un-conditionally as part of suspend/deep sleep exit.

Change-Id: Ie1cbe174aec04ddde5779ad4fabdf075cffa955d
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>