Merge tag 'arm-soc/for-4.13/defconfig-arm64' of http://github.com/Broadcom/stblinux into next/arm64

This pull request contains ARM64 defconfig changes for 4.13, please pull the
following:

- Florian enables ARCH_BRCMSTB in the arm64 defconfig to get more build coverage

* tag 'arm-soc/for-4.13/defconfig-arm64' of http://github.com/Broadcom/stblinux

:
  arm64: defconfig: Enable ARCH_BRCMSTB

Signed-off-by: Olof Johansson <olof@lixom.net>