Revert "ARM: dts: aspeed: Add USB2.0 device controller node"

This reverts commit 2cee50bf.

It was already applied, and with this duplicate there is now build
problems.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reported-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>