arm64: defconfig: Enable HFPLL

The high frequency pll is required on compatible Qualcomm SoCs to
support the CPU frequency scaling feature.
Co-developed-by: Niklas Cassel <niklas.cassel@linaro.org>
Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org>
Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20191125142511.681149-6-niklas.cassel@linaro.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/configs/defconfig

@@ -715,6 +715,7 @@ CONFIG_MSM_GCC_8998=y
 CONFIG_QCS_GCC_404=y
 CONFIG_SDM_GCC_845=y
 CONFIG_SM_GCC_8150=y
+CONFIG_QCOM_HFPLL=y
 CONFIG_HWSPINLOCK=y
 CONFIG_HWSPINLOCK_QCOM=y
 CONFIG_ARM_MHU=y