ARM: dts: msm: Use PMA8084 PMIC devices on msmsamarium

Include the msm-pma8084.dtsi PMIC file inside of the
msmsamarium.dtsi file so that PMA8084 devices are available for
use on msmsamarium targets.

Change-Id: I6c3820128ca9908a4c0a7c6217b0f054a1d01185
Signed-off-by: David Collins <collinsd@codeaurora.org>