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

Since commit 84af7a6194e4 ("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>
diff --git a/drivers/powercap/Kconfig b/drivers/powercap/Kconfig
index dc1c138..ebc4d45 100644
--- a/drivers/powercap/Kconfig
+++ b/drivers/powercap/Kconfig
@@ -23,7 +23,7 @@
 	tristate "Intel RAPL Support via MSR Interface"
 	depends on X86 && IOSF_MBI
 	select INTEL_RAPL_CORE
-	---help---
+	help
 	  This enables support for the Intel Running Average Power Limit (RAPL)
 	  technology via MSR interface, which allows power limits to be enforced
 	  and monitored on modern Intel processors (Sandy Bridge and later).