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>

mm/Kconfig.debug

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config PAGE_EXTENSION
 	bool "Extend memmap on extra space for more information on page"
-	---help---
+	help
 	  Extend memmap on extra space for more information on page. This
 	  could be used for debugging features that need to insert extra
 	  field for every page. This extension enables us to save memory
@@ -13,7 +13,7 @@ config DEBUG_PAGEALLOC
 	depends on DEBUG_KERNEL
 	depends on !HIBERNATION || ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC
 	select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC
-	---help---
+	help
 	  Unmap pages from the kernel linear mapping after free_pages().
 	  Depending on runtime enablement, this results in a small or large
 	  slowdown, but helps to find certain types of memory corruption.
@@ -41,7 +41,7 @@ config DEBUG_PAGEALLOC
 config DEBUG_PAGEALLOC_ENABLE_DEFAULT
 	bool "Enable debug page memory allocations by default?"
 	depends on DEBUG_PAGEALLOC
-	---help---
+	help
 	  Enable debug page memory allocations by default? This value
 	  can be overridden by debug_pagealloc=off|on.
 
@@ -65,7 +65,7 @@ config PAGE_OWNER
 config PAGE_POISONING
 	bool "Poison pages after freeing"
 	select PAGE_POISONING_NO_SANITY if HIBERNATION
-	---help---
+	help
 	  Fill the pages with poison patterns after free_pages() and verify
 	  the patterns before alloc_pages. The filling of the memory helps
 	  reduce the risk of information leaks from freed data. This does
@@ -80,7 +80,7 @@ config PAGE_POISONING
 config PAGE_POISONING_NO_SANITY
 	depends on PAGE_POISONING
 	bool "Only poison, don't sanity check"
-	---help---
+	help
 	   Skip the sanity checking on alloc, only fill the pages with
 	   poison on free. This reduces some of the overhead of the
 	   poisoning feature.
@@ -91,7 +91,7 @@ config PAGE_POISONING_NO_SANITY
 config PAGE_POISONING_ZERO
 	bool "Use zero for poisoning instead of debugging value"
 	depends on PAGE_POISONING
-	---help---
+	help
 	   Instead of using the existing poison value, fill the pages with
 	   zeros. This makes it harder to detect when errors are occurring
 	   due to sanitization but the zeroing at free means that it is
@@ -104,7 +104,7 @@ config DEBUG_PAGE_REF
 	bool "Enable tracepoint to track down page reference manipulation"
 	depends on DEBUG_KERNEL
 	depends on TRACEPOINTS
-	---help---
+	help
 	  This is a feature to add tracepoint for tracking down page reference
 	  manipulation. This tracking is useful to diagnose functional failure
 	  due to migration failures caused by page reference mismatches.  Be
@@ -115,7 +115,7 @@ config DEBUG_PAGE_REF
 config DEBUG_RODATA_TEST
     bool "Testcase for the marking rodata read-only"
     depends on STRICT_KERNEL_RWX
-    ---help---
+	help
       This option enables a testcase for the setting rodata read-only.
 
 config ARCH_HAS_DEBUG_WX