msm: mdss: dsi: configure data lane swap for newer hw revisions

Starting with DSI PHY hardware revisions 3.0 and above, data lane swap
configurations need to be programmed via the DSI PHY interface. In other
cases, a new register interface has been introduced to program the lane
swap configuration for DSI controller revision 2.0 and above. Refactor
the existing implementation to account for these hardware changes.

Change-Id: I3772c614bfee0ed13f30a38535bb814158d23226
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>