sdcard_image-phy.bbclass: Add ubifs image to vfat boot partition
sdcard_image-phy.bbclass: Add ubifs image to vfat boot partition

To update fully from SD-Card the ubifs image of the rootfs has
to be added to SD-Card. Adjust the vfat patition size to the image
size and copy the rootfs to it.

Signed-off-by: Teresa Gámez <2d82cfe4bbaeb801b9ddb09534938e4b16a54218@phytec.de>
Signed-off-by: Stefan Müller-Klieser <a3e08e35e4a42be768e7d0e76ae1ba321c2a66dd@phytec.de>

PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec