arm64: defconfig: enable ARM_ARMADA_37XX_CPUFREQ

Add the cpu frequency scaling support for Armada 37xx by default, this
should allow a better coverage in kernel continuous integration tests.
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>

arch/arm64/configs/defconfig

@@ -99,6 +99,7 @@ CONFIG_WQ_POWER_EFFICIENT_DEFAULT=y
 CONFIG_ARM_CPUIDLE=y
 CONFIG_CPU_FREQ=y
 CONFIG_CPUFREQ_DT=y
+CONFIG_ARM_ARMADA_37XX_CPUFREQ=y
 CONFIG_ARM_BIG_LITTLE_CPUFREQ=y
 CONFIG_ARM_SCPI_CPUFREQ=y
 CONFIG_ACPI_CPPC_CPUFREQ=m