linux-imx

ARM: dts: aspeed: Add G4 USB pinmux

Set the default pinmux for EHCI so boards don't have to do
it, and document why it is not set for UHCI.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>