usb: gsi: Retry USB function wakeup if USB is into low power mode

Consider case where USB is into low power mode after receiving USB
function suspend from host. To invoke function remote wakeup USB
controller is rerquired to bring out of low power mode. Hence once
USB controller and USB bus is resumed, perform USB function wakeup
from composite_resume() context to resume USB function on host side.

Change-Id: Id5103f0e7bf3d324cd6c206d1d6214f6d6c107a4
Signed-off-by: Mayank Rana <mrana@codeaurora.org>