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/arch/mips/Kconfig b/arch/mips/Kconfig
index eb1e86c..7f2dbfb 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2741,7 +2741,7 @@
 	depends on RELOCATABLE
 	range 0x0 0x01000000
 	default "0x00100000"
-	---help---
+	help
 	  A table of relocation data will be appended to the kernel binary
 	  and parsed at boot to fix up the relocated kernel.
 
@@ -2755,7 +2755,7 @@
 config RANDOMIZE_BASE
 	bool "Randomize the address of the kernel image"
 	depends on RELOCATABLE
-	---help---
+	help
 	  Randomizes the physical and virtual address at which the
 	  kernel image is loaded, as a security feature that
 	  deters exploit attempts relying on knowledge of the location
@@ -2773,7 +2773,7 @@
 	range 0x0 0x40000000 if EVA || 64BIT
 	range 0x0 0x08000000
 	default "0x01000000"
-	---help---
+	help
 	  When kASLR is active, this provides the maximum offset that will
 	  be applied to the kernel image. It should be set according to the
 	  amount of physical RAM available in the target system minus