[U-Boot] [PATCH] usb: tegra: move Tegra EHCI implementation to correct place

[Marek Vasut <marex@denx.de>]

Dear Lucas Stach,

> Move the Tegra EHCI implementation to the correct directory in the tree.
> This code is specific to the Tegra EHCI controller, not to the Tegra SoC
> in general.
> 
> This is not just a move of the code, but also some small changes squashed

Unsquash them please, it's really hard to review. Also, use git format-patch -M 
-C to generate the patchset and to detect renames.

> in. Most notable:
> - removed some unneeded parameters from function calls, to make functions
>   more self contained
> - decrease max controller count to 3, both Tegra 2 and 3 have at most 3
>   EHCI controllers, we can aleays increase this later if the need arises
> - controllers only get activated at ehci_hcd_init time, not at
> board_usb_init, which is the more obvious init point and saves time if you
> are not going to use usb in your boot process at all
[...]
Best regards,
Marek Vasut