Revert "ARM: dts: msm: Add new dt node for low power mode driver workarounds"

This reverts commit 8d34b9c2.

This workaround for CX rail bumpup is not required as there is a
better workaround suggested by design team.

Change-Id: I00a186ddef575ac5d4e10b0a8ba046aa00b01373
Signed-off-by: Srinivas Rao L <lsrao@codeaurora.org>