usb: host: Disable system wakeup if remote wakeup is not required

For some platforms, remote wakeup capability from system suspend
is not a default requirement.
Keep system wakeup as disabled from dwc3-msm and xhci-plat.

Change-Id: Ic32af43c818f666228db5921e927f66c3554c0f4
Signed-off-by: Harsh Agarwal <harshq@codeaurora.org>