arm64: defconfig: Enable cpufreq for MediaTek

The MediaTek CPUFreq driver provides control of CPU frequency/voltage
on MediaTek SoCs. Since there's no device-tree node to bind it to, the
driver needs to be enabled built-in. Enable it so.
Signed-off-by: NNícolas F. R. A. Prado <nfraprado@collabora.com>
Link: https://lore.kernel.org/r/20211217154452.868419-1-nfraprado@collabora.comSigned-off-by: NMatthias Brugger <matthias.bgg@gmail.com>

arch/arm64/configs/defconfig

@@ -96,6 +96,7 @@ CONFIG_ARM_QCOM_CPUFREQ_HW=y
 CONFIG_ARM_RASPBERRYPI_CPUFREQ=m
 CONFIG_ARM_SCMI_CPUFREQ=y
 CONFIG_ARM_TEGRA186_CPUFREQ=y
+CONFIG_ARM_MEDIATEK_CPUFREQ=y
 CONFIG_QORIQ_CPUFREQ=y
 CONFIG_ARM_SCMI_PROTOCOL=y
 CONFIG_ARM_SCPI_PROTOCOL=y