board-status: Add field for release year

Add the option to add a release year to each mainboard to
get a sense of how old the hardware is.

Change-Id: Id43c80fdf8bf65241b2be92678616d1774529f8c
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: http://review.coreboot.org/9945
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
1 file changed