ARM: dts: qcom: mdm9615: move PMIC interrupts to the board files

ARM: dts: qcom: mdm9615: move PMIC interrupts to the board files

The interrupt of SSBI PMICs is routed to the SoCs GPIO. As such, it is
not a property of the SoC, it is a property of the particular board
(even if it is standard and unified between all devices). Move these
interrupt specifications to the board files.

Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230928110309.1212221-14-dmitry.baryshkov@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>