For NFC v1 (i.MX27), swapping must be done between offset 464 of Main
buffer and offset 4 of Spare buffer.
Change-Id: I09c2036e88770032da87d5846cd2094847f47b46
Signed-off-by: Gaetan Carlier <gcembed@gmail.com>
Reviewed-on: http://openocd.zylin.com/1692
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>