[U-Boot] [PATCH] usb: Add new command to set USB 2.0 port test modes

[Julius Werner]

Hi Tom,

This patch is not really target specific, it works on all platforms that
support USB 2.0. I just wrapped it in a new config option because most
people probably won't need it… it is only really useful for hardware
verification, so I figured whoever needs it can hack in the config option
himself. However, I could also just remove the #ifdef and activate it by
default if you prefer that. No new code will get executed unless you type
the new command, so it should not have any negative effect besides a
negligible code size increase.