ARM: dts: msm: Add LCDB and REVID device for pm855L

LCDB supports the positive and negative bias supplies needed for
LCD panels that will be interfaced with sdm855 platforms that
uses pm855L. Since LCDB needs REVID device to read PMIC subtype,
specify the required configuration for it.

Change-Id: I9b3f5c72be5d6a221850a0b672cecbf374087b3d
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>