[PATCH v3 9/9] configs: Enable support for the XHCI controller on RPI4 board (ARM 64-bit)

[Sylwester Nawrocki]

On 12.05.2020 20:47, Sylwester Nawrocki wrote:
> This requires enabling BRCMSTB PCIe and XHCI_PCI drivers as well as PCI
> and USB commands. To get it working one has to call the following commands:
> "pci enum; usb start;", thus such commands have been added to the default
> "preboot" environment variable. One has to update their environment if it
> is already configured to get this feature working out of the box.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
> Signed-off-by: Sylwester Nawrocki <s.nawrocki at samsung.com>
> ---
> Changes since v2:
>  - rpi_4_32b_defconfig, rpi_4_defconfig changes moved to separate
>    patch

rpi_4_defconfig changes should also be part of $subject patch,
I will fix it in next version.