use the same option as linux -O
as example due to a bug in already deployed kernel we must for the VID offset
at 512 even it should be at 256
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>