Since the commit
	5a1a5ed
	ARM: images: use piggydata

the loading mechanism in the arria10 xload is neither functional nor needed.
Now, barebox has/can be loaded like a normal image, so the filesize, that is
written to the barebox header, can be evaluated.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>