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/pnp/Kconfig

@@ -7,7 +7,7 @@ menuconfig PNP
 	bool "Plug and Play support"
 	depends on HAS_IOMEM
 	depends on ISA || ACPI
-	---help---
+	help
 	  Plug and Play (PnP) is a standard for peripherals which allows those
 	  peripherals to be configured by software, e.g. assign IRQ's or other
 	  parameters. No jumpers on the cards are needed, instead the values

drivers/pnp/pnpbios/Kconfig

@@ -6,7 +6,7 @@ config PNPBIOS
 	bool "Plug and Play BIOS support"
 	depends on ISA && X86_32
 	default n
-	---help---
+	help
 	  Linux uses the PNPBIOS as defined in "Plug and Play BIOS
 	  Specification Version 1.0A May 5, 1994" to autodetect built-in
 	  mainboard resources (e.g. parallel port resources).
@@ -26,7 +26,7 @@ config PNPBIOS
 config PNPBIOS_PROC_FS
 	bool "Plug and Play BIOS /proc interface"
 	depends on PNPBIOS && PROC_FS
-	---help---
+	help
 	  If you say Y here and to "/proc file system support", you will be
 	  able to directly access the PNPBIOS.  This includes resource
 	  allocation, ESCD, and other PNPBIOS services.  Using this