ARM: dts: msm: Add support for PM8916 on MSM8909

Refactor MSM8909 device tree files and add support
for PM8916 on MSM8909.

Refactor MSM8909 DT files as follows:
1. Move all PMIC specific configurations common to all platforms
   (CDP/MTP/QRD) to PMIC specific DT files:
   - common PM8909 nodes in msm8909-pm8909.dtsi
   - common PM8916 nodes in msm8909-pm8916.dtsi
2. Move all PMIC specific configuration for a particular platform
   to PMIC-platform specific DT files
   - all PM8909 specific nodes for CDP: msm8909-pm8909-cdp.dtsi
   - all PM8916 specific nodes for CDP: msm8909-pm8916-cdp.dtsi

Change-Id: Ib4e4accc8f7f22ab7e7b3c43edfcef38038aaef0
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>