usb: dwc3-msm: Adjust SSPHY parameters

Tweak SSPHY specific parameters to increase TX full swing
amplitude and de-emphasis in order to pass SuperSpeed
electrical compliance tests. Set parameters to values provided
by hardware team.

CRs-fixed: 474264
Change-Id: I1e984d6611de1e4d9eeda58746d83dd05aef1c98
Signed-off-by: Jack Pham <jackp@codeaurora.org>