ARM: dts: msm: move general DT entry to separate qrd sku dtsi files

General configs can be include by different qrd overlay and non-overlay
dts files. So added common dtsi file for sku1 and sku2 dtsi and move
general configs into those common dtsi files.

Change-Id: I04b486b576f58571de3ba76644314f08b68364e9
Signed-off-by: Teng Fei Fan <tengfei@codeaurora.org>