ARM: at91/dt: sama5d2: Use new compatible for ohci node

Use compatible "atmel,sama5d2-ohci" to be capable of suspending
ports while sleep to save the power consumption.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>