ARM: configs: qcom_defconfig: Enable APCS IPC mailbox driver

Enable Qualcomm APCS IPC mailbox driver for IPC communication between
application processor and other masters in platforms like SDX55.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210408170930.91834-2-manivannan.sadhasivam@linaro.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm/configs/qcom_defconfig

@@ -232,6 +232,7 @@ CONFIG_ARM_SMMU=y
 CONFIG_HWSPINLOCK=y
 CONFIG_HWSPINLOCK_QCOM=y
 CONFIG_MAILBOX=y
+CONFIG_QCOM_APCS_IPC=y
 CONFIG_REMOTEPROC=y
 CONFIG_QCOM_ADSP_PIL=y
 CONFIG_QCOM_Q6V5_PIL=y