most: tell what the MOST acronym means

Tell kconfig users what "MOST" means so that they can have a bit
of information about what it is. I.e., more than zero information.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Christian Gromm <christian.gromm@microchip.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20230117182840.26890-1-rdunlap@infradead.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>