drivers/cpufreq: Enable virt-cpufreq in defconfig.

Enable the virt-cpufreq module in the defconfig (set to y).

Signed-off-by: Floris Westermann <westermann@google.com>
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index f423d08..a882079 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -89,6 +89,7 @@
 CONFIG_CPU_FREQ_GOV_CONSERVATIVE=m
 CONFIG_CPU_FREQ_GOV_SCHEDUTIL=y
 CONFIG_CPUFREQ_DT=y
+CONFIG_CPUFREQ_VIRT=y
 CONFIG_ACPI_CPPC_CPUFREQ=m
 CONFIG_ARM_ALLWINNER_SUN50I_CPUFREQ_NVMEM=m
 CONFIG_ARM_ARMADA_37XX_CPUFREQ=y