Merge tag 'arm-soc/for-4.12/defconfig' of http://github.com/Broadcom/stblinux into next/defconfig

Pull "Broadcom defconfig changes for 4.12" from Florian Fainelli:

This pull request contains Broadcom ARM-based SoCs defconfig updates for 4.12,
please pull the following:

- Gerd enables the BCM2835 MMC driver which yields better performance than the
  default one (iProc)

* tag 'arm-soc/for-4.12/defconfig' of http://github.com/Broadcom/stblinux:
  arm: set CONFIG_MMC_BCM2835=y in bcm2835_defconfig and multi_v7_defconfig
  ARM: bcm2835: Enable missing CMA settings for VC4 driver