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/dma/Kconfig b/drivers/dma/Kconfig
index e9ed916..de41d79 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -198,7 +198,7 @@
 	depends on FSL_SOC
 	select DMA_ENGINE
 	select ASYNC_TX_ENABLE_CHANNEL_SWITCH
-	---help---
+	help
 	  Enable support for the Freescale Elo series DMA controllers.
 	  The Elo is the DMA controller on some mpc82xx and mpc83xx parts, the
 	  EloPlus is on mpc85xx and mpc86xx and Pxxx parts, and the Elo3 is on
@@ -233,7 +233,7 @@
 	depends on FSL_SOC && !ASYNC_TX_ENABLE_CHANNEL_SWITCH
 	select DMA_ENGINE
 	select DMA_ENGINE_RAID
-	---help---
+	help
 	  Enable support for Freescale RAID Engine. RAID Engine is
 	  available on some QorIQ SoCs (like P5020/P5040). It has
 	  the capability to offload memcpy, xor and pq computation
@@ -414,7 +414,7 @@
 	tristate "Freescale MPC512x built-in DMA engine support"
 	depends on PPC_MPC512x || PPC_MPC831x
 	select DMA_ENGINE
-	---help---
+	help
 	  Enable support for the Freescale MPC512x built-in DMA engine.
 
 config MV_XOR
@@ -423,7 +423,7 @@
 	select DMA_ENGINE
 	select DMA_ENGINE_RAID
 	select ASYNC_TX_ENABLE_CHANNEL_SWITCH
-	---help---
+	help
 	  Enable support for the Marvell XOR engine.
 
 config MV_XOR_V2
@@ -433,7 +433,7 @@
 	select DMA_ENGINE_RAID
 	select ASYNC_TX_ENABLE_CHANNEL_SWITCH
 	select GENERIC_MSI_IRQ_DOMAIN
-	---help---
+	help
 	  Enable support for the Marvell version 2 XOR engine.
 
 	  This engine provides acceleration for copy, XOR and RAID6