arm: dts: qcom: Add APQ8084 chipset SPMI PMIC's nodes

PMA8084 have 2 SPMI devices per physical package. Add their
configuration nodes and include them in boards which are using
AQP8084 based chipset.

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: Kumar Gala <galak@codeaurora.org>
Signed-off-by: Olof Johansson <olof@lixom.net>