ARM: dts: msm: Include rpm-regulator header in trinket regulator files

Include the "qcom,rpm-smd-regulator.h" file in the regulator
files to avoid the compilation failure when overlay is enabled.

Change-Id: Ib7054861b56be1564f414de23112dfc54c942d95
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>