Update defconfig, adding:
 - USB gadget
 - PWM support using the generic framework
 - generic PWM leds
 - LEDs triggers
 - Power/reset

and removing deprecated config options.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>