arm64: defconfig: Add CONFIG_QCOM_RPMPD

RPMPD provides us the CS/MX power domains needed to boot the modem
subsystem on msm8998 for wifi.
Signed-off-by: NJeffrey Hugo <jeffrey.l.hugo@gmail.com>
Link: https://lore.kernel.org/r/20200528184752.4747-1-jeffrey.l.hugo@gmail.comSigned-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/configs/defconfig

@@ -858,6 +858,7 @@ CONFIG_QCOM_GENI_SE=y
 CONFIG_QCOM_RMTFS_MEM=m
 CONFIG_QCOM_RPMH=y
 CONFIG_QCOM_RPMHPD=y
+CONFIG_QCOM_RPMPD=y
 CONFIG_QCOM_SMEM=y
 CONFIG_QCOM_SMD_RPM=y
 CONFIG_QCOM_SMP2P=y