Revert "ARM: dts: msm: Use new railway resources for pmdcalifornium regulators"

This reverts commit 4af6c347
("ARM: dts: msm: Use new railway resources for pmdcalifornium
regulators"). The new RWCX/RWMX resources are not yet supported
by RPM.

Change-Id: I98837c08341dd6ab7aff120d548e99cdcbe86d04
Signed-off-by: Devesh Jhunjhunwala <deveshj@codeaurora.org>