$(board_name) was providing content on "boardtype" (and optionally
"boardnum") NVRAM values. That function requires & expects more specific
and detailed model name extracted from the /proc/cpuinfo.
Fixes: f12a32630ff5 ("treewide: use the generic board_name function")
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
9d95d5e799