staging: most: use help instead of ---help--- in Kconfig

  - Resolve the following warning from the Kconfig,
    "WARNING: prefer 'help' over '---help---' for new help texts
Signed-off-by: NMoses Christopher <moseschristopherb@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/most/Kconfig

@@ -3,7 +3,7 @@ menuconfig MOST
         tristate "MOST support"
 	depends on HAS_DMA && CONFIGFS_FS
         default n
-        ---help---
+        help
 	  Say Y here if you want to enable MOST support.
 	  This driver needs at least one additional component to enable the
 	  desired access from userspace (e.g. character devices) and one that