scripts: imx-image: Fix image size in flash header for i.MX35
The i.MX35 needs additional 0x1000 byte. This quirk moved to the wrong
location during refactoring of imx-image for v2016.03.0.
Fixes: adade597593442 ""scripts: imx: Allow to create signed images")
Signed-off-by: Daniel Krueger <daniel.krueger@systec-electronic.com>
Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>