arm64: defconfig: Enable the APCS IPC driver on Qualcomm platforms

The APCS block is present on several Qualcomm SoCs e.g. 8916, 8996.  On the
8916 it is needed to enable the clock controller that in turn enables
cpufreq on the platform while on the 8996 it is needed for communication
with RPM.
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

arch/arm64/configs/defconfig

@@ -525,6 +525,7 @@ CONFIG_ARM_MHU=y
 CONFIG_PLATFORM_MHU=y
 CONFIG_BCM2835_MBOX=y
 CONFIG_HI6220_MBOX=y
+CONFIG_QCOM_APCS_IPC=y
 CONFIG_ROCKCHIP_IOMMU=y
 CONFIG_ARM_SMMU=y
 CONFIG_ARM_SMMU_V3=y