sama5d3-xplained-sd: use wic to generate ready to flash rootfs
sama5d3-xplained-sd: use wic to generate ready to flash rootfs

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

Conflicts:
	conf/machine/sama5d3-xplained-sd.conf

linux4sam/meta-atmel,alexandrebelloni/meta-atmel,linux4sam/meta-atmel,linux4sam/meta-atmel,linux4sam/meta-atmel,alexandrebelloni/meta-atmel,linux4sam/meta-atmel,alexandrebelloni/meta-atmel