treewide: replace '---help---' in Kconfig files with 'help'

Since commit 84af7a6194 ("checkpatch: kconfig: prefer 'help' over
'---help---'"), the number of '---help---' has been gradually
decreasing, but there are still more than 2400 instances.

This commit finishes the conversion. While I touched the lines,
I also fixed the indentation.

There are a variety of indentation styles found.

  a) 4 spaces + '---help---'
  b) 7 spaces + '---help---'
  c) 8 spaces + '---help---'
  d) 1 space + 1 tab + '---help---'
  e) 1 tab + '---help---'    (correct indentation)
  f) 1 tab + 1 space + '---help---'
  g) 1 tab + 2 spaces + '---help---'

In order to convert all of them to 1 tab + 'help', I ran the
following commend:

  $ find . -name 'Kconfig*' | xargs sed -i 's/^[[:space:]]*---help---/\thelp/'

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

drivers/net/appletalk/Kconfig

@@ -5,7 +5,7 @@
 config ATALK
 	tristate "Appletalk protocol support"
 	select LLC
-	---help---
+	help
 	  AppleTalk is the protocol that Apple computers can use to communicate
 	  on a network.  If your Linux box is connected to such a network and you
 	  wish to connect to it, say Y.  You will need to use the netatalk package
@@ -79,7 +79,7 @@ config COPS_TANGENT
 config IPDDP
 	tristate "Appletalk-IP driver support"
 	depends on DEV_APPLETALK && ATALK
-	---help---
+	help
 	  This allows IP networking for users who only have AppleTalk
 	  networking available. This feature is experimental. With this
 	  driver, you can encapsulate IP inside AppleTalk (e.g. if your Linux