ARM: dts: msm: add DSI PHY refgen for sdm670

Add refgen regulator support for DSI PHY, so it can be
enabled/disabled when required.

Change-Id: I7399ba4cbe05a189ff01a1acda087c3283b3e8d9
Signed-off-by: Sandeep Panda <spanda@codeaurora.org>
1 file changed