usb: dwc3-msm: Fix SuperSpeed when SuperSpeedPlus is supported

On DWC 3.1 IP, maximum_speed may be USB_SPEED_SUPER_PLUS. There
are several places where this value is using an equals comparison
with USB_SPEED_SUPER, which will fail when speed is SSP, hence
avoiding sequence needed to allow SuperSpeed operation. The
comparisons should be changed from == to >=.

Change-Id: Id43290379f1977ef181756ca77f43b3bb5d277d7
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Signed-off-by: Mayank Rana <mrana@codeaurora.org>