[U-Boot] Driver model 'next' tree

[Simon Glass]

Hi,

I'm planning to use the 'next' tree for u-boot-dm and start applying
things targeted for U-Boot 2015.07 as they are ready. There is quite a
bit in flight at present and now RC3 is out for U-Boot 2015.04, the
rebase cost should be fairly small. This tree will run for
approximately 6 weeks.

Things I am aware of that may be candidates for this tree when they are ready:
- networking
- pci
- pmic
- cros_ec things
- usb

If there are any objections, please sing out.

Tom, I'm not sure if you are interested in having a mainline 'next'
tree, but let me know if so.

Regards,
Simon