arm64: defconfig: ARM_IMX_CPUFREQ_DT=m

For imx8m we need a separate small driver to read "speed grading"
information from fuses and determine which OPPs are supported.
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/configs/defconfig

@@ -82,6 +82,7 @@ CONFIG_CPUFREQ_DT=y
 CONFIG_ACPI_CPPC_CPUFREQ=m
 CONFIG_ARM_ARMADA_37XX_CPUFREQ=y
 CONFIG_ARM_SCPI_CPUFREQ=y
+CONFIG_ARM_IMX_CPUFREQ_DT=m
 CONFIG_ARM_TEGRA186_CPUFREQ=y
 CONFIG_ARM_SCPI_PROTOCOL=y
 CONFIG_RASPBERRYPI_FIRMWARE=y