Merge tag 'arm-soc/for-5.4/defconfig-arm64' of https://github.com/Broadcom/stblinux into arm/defconfig

This pull request contains Broadcom ARM64-based SoCs defconfig updates
for 5.4, please pull the following:

- Nicolas enables the Raspberry Pi CPUFREQ driver in the ARM64 defconfig file

* tag 'arm-soc/for-5.4/defconfig-arm64' of https://github.com/Broadcom/stblinux:
  arm64: defconfig: enable cpufreq support for RPi3