drm: msm: dp: change voltage swing levels for lito/kona

Change HBR and RBR voltage swing level for 600mV-3.6db
settings on lito/kona as per hardware specification in
dp phy hpg.

Change-Id: If86bf158fb8b538d7ea31364a757584201d5f1c3
Signed-off-by: RAJAT GUPTA <rajatgu@codeaurora.org>