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/ethernet/ibm/Kconfig

@@ -7,7 +7,7 @@ config NET_VENDOR_IBM
 	bool "IBM devices"
 	default y
 	depends on PPC_PSERIES || PPC_DCR || (IBMEBUS && SPARSEMEM)
-	---help---
+	help
 	  If you have a network (Ethernet) card belonging to this class, say Y.
 
 	  Note that the answer to this question doesn't directly affect the
@@ -20,7 +20,7 @@ if NET_VENDOR_IBM
 config IBMVETH
 	tristate "IBM LAN Virtual Ethernet support"
 	depends on PPC_PSERIES
-	---help---
+	help
 	  This driver supports virtual ethernet adapters on newer IBM iSeries
 	  and pSeries systems.
 
@@ -32,7 +32,7 @@ source "drivers/net/ethernet/ibm/emac/Kconfig"
 config EHEA
 	tristate "eHEA Ethernet support"
 	depends on IBMEBUS && SPARSEMEM
-	---help---
+	help
 	  This driver supports the IBM pSeries eHEA ethernet adapter.
 
 	  To compile the driver as a module, choose M here. The module
@@ -41,7 +41,7 @@ config EHEA
 config IBMVNIC
 	tristate "IBM Virtual NIC support"
 	depends on PPC_PSERIES
-	---help---
+	help
 	  This driver supports Virtual NIC adapters on IBM i and IBM System p
 	  systems.