arm: rpi: Enable USB and Ethernet driver model Raspberry Pi

Raspberry Pi uses a DWC2 USB controller and a SMSC USB Ethernet adaptor. Neither of these currently support driver model.

This series does the following:
- Move Raspberry Pi to use device tree control (u-boot-dtb.bin instead of

     u-boot.bin)

- Remove GPIO platform data (now uses device tree)
- Remove serial platform data (now uses device tree)
- Add 'ranges' support to simple-bus
- Convert the DWC2 USB driver to support driver model
- Convert the SMSC95XX USB Ethernet driver to support driver model
- Enable CONFIG_DM_ETH and CONFIG_DM_USB on Raspberry Pi

With Ethernet active the device list looks something like this:

U-Boot> dm tree
Class Probed Name
----------------------------------------

 root        [ + ]    root_driver
 simple_bus  [ + ]    |-- soc
 gpio        [   ]    |   |-- gpio at 7e200000
 serial      [ + ]    |   |-- uart at 7e201000
 usb         [ + ]    |   `-- usb at 7e980000
 usb_hub     [ + ]    |       `-- usb_hub
 usb_hub     [ + ]    |           `-- usb_hub
 eth         [ + ]    |               `-- smsc95xx_eth
 simple_bus  [   ]    `-- clocks

Raspberry Pi 2 is not converted as I do not have one to test at present.

Simon Glass (20):
dm: net: Support usbethaddr environment variable
dm: usb: Allow USB Ethernet whenever CONFIG_DM_ETH is not defined
dm: usb: Add an errno.h header to usb_ether.c
dm: usb: Prepare dwc2 driver for driver-model conversion
dm: usb: Add driver-model support to dwc2
net: smsc95xx: Sort the include files
net: smsc95xx: Rename AX_RX_URB_SIZE to RX_URB_SIZE
net: smsc95xx: Correct the error numbers
net: smsc95xx: Prepare for conversion to driver model
net: smsc95xx: Add driver-model support
dm: serial: Update binding for PL01x serial UART
dm: Support address translation for simple-bus

arm: rpi: Define CONFIG_TFTP_TSIZE to show tftp size info
arm: rpi: Bring in kernel device tree files
arm: rpi: Device tree modifications for U-Boot
arm: rpi: Enable device tree control for Rasberry Pi
arm: rpi: Drop the UART console platform data
arm: rpi: Drop the GPIO platform data
arm: rpi: Move to driver model for USB
arm: rpi: Use driver model for Ethernet