ARM: qcom_defconfig: Enable ARM PSCI support

Enable ARM Power State Coordination Interface (PSCI) support on Qualcomm
platforms.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210118053853.56224-12-manivannan.sadhasivam@linaro.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>