ARM: dts: msm: Add snapshot of PMIC and regulator device tree files

This is snapshot of PMIC and regulator device tree files as of
msm-3.18 'commit d57440af212c ( Merge "cnss2: Add device pointer
to all external APIs")'.

Also change the file names to meet the naming convention used
in the current kernel version as below and take care of required
includes.

msm-pm8953-rpm-regulator.dtsi ===> pm8953-rpm-regulator.dtsi
msm-pm8953.dtsi ===> pm8953.dtsi

Change-Id: Ibe21d0a33b0f3381ed0ff081cce31fbd939fcac9
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>