From: Bjorn Helgaas <bjorn.helgaas@hp.com>
      Anders Gustafsson <andersg@0x63.nu>
      Roman Zippel <zippel@linux-m68k.org>

This patch fixes menuconfig so it can display help text for individual
choice group config entries.

Previously it would only display the help text attached to the "choice"
item.  There was no way to display the help attached to individual config
entries inside the choice group.  Typically, the "choice" item has no help
text, and all the useful help is attached to the individual entries, so
this was a bit of a problem.