ARM: msm: Use PMA8084 PMIC devices on APQ8084

Include the msm-pma8084.dtsi PMIC file inside of the apq8084.dtsi
file so that PMA8084 devices are available for use on APQ8084
targets.

Change-Id: Ida79f716b48ab75400b2d454b2aca9886fa63eaa
Signed-off-by: David Collins <collinsd@codeaurora.org>