Merge tag 'arm-soc/for-4.18/defconfig-arm64' of https://github.com/Broadcom/stblinux...

This pull request contains Broadcom ARM64-based SoCs defconfig changes
for 4.18, please pull the following:

- Stefan provides a set of updates targeting the Raspberry Pi 3 B+
  platform: LAN7515 USB Ethernet driver, Cypress CYW43455 Bluetooth when
  using the Pi 3 B+ in AArch64 boot mode. He also updates the ARM64
  defconfig to create a bigger default CMA region to let the VideoCore 4
  driver initialize correctly.

* tag 'arm-soc/for-4.18/defconfig-arm64' of https://github.com/Broadcom/stblinux:
  arm64: defconfig: Increase CMA size for VC4
  arm64: defconfig: Enable LAN and BT support for RPi 3 B+

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