usb: xhci-msm-hsic: Set autosuspend delay for root hub to 0

By default set root hub autosusoend delay to 0. This reduces
time HSIC controller is active when the bus is idle for better
power savings.

Change-Id: I6252759c75f2ecc0e7fd3c4a72271ad731b6f896
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>