arm64: defconfig: Enable devfreq support for i.MX8MQ

This is needed to make DRAM frequency scaling via defreq as used
on the Librem 5 and Librem 5 Devkit.

With the interconnect support enabled we now need imx devfreq on top
to make this work.
Signed-off-by: Guido Günther <agx@sigxcpu.org>

arch/arm64/configs/defconfig

@@ -1007,6 +1007,8 @@ CONFIG_ARCH_TEGRA_234_SOC=y
 CONFIG_ARCH_K3_AM6_SOC=y
 CONFIG_ARCH_K3_J721E_SOC=y
 CONFIG_TI_SCI_PM_DOMAINS=y
+CONFIG_ARM_IMX_BUS_DEVFREQ=m
+CONFIG_ARM_IMX8M_DDRC_DEVFREQ=m
 CONFIG_EXTCON_PTN5150=m
 CONFIG_EXTCON_USB_GPIO=y
 CONFIG_EXTCON_USBC_CROS_EC=y