sparc64: added more config options to the menus

moved a few config entries inside a menu so we
do not clutter the first screen up with a lot of detailed
config options.
The structure now remotely resemble the structure for i386

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>