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/dlink/Kconfig

@@ -7,7 +7,7 @@ config NET_VENDOR_DLINK
 	bool "D-Link devices"
 	default y
 	depends on PCI
-	---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
@@ -21,7 +21,7 @@ config DL2K
 	tristate "DL2000/TC902x/IP1000A-based Gigabit Ethernet support"
 	depends on PCI
 	select CRC32
-	---help---
+	help
 	  This driver supports DL2000/TC902x/IP1000A-based Gigabit ethernet cards,
 	  which includes
 	  D-Link DGE-550T Gigabit Ethernet Adapter.
@@ -37,7 +37,7 @@ config SUNDANCE
 	depends on PCI
 	select CRC32
 	select MII
-	---help---
+	help
 	  This driver is for the Sundance "Alta" chip.
 	  More specific information and updates are available from
 	  <http://www.scyld.com/network/sundance.html>.
@@ -45,7 +45,7 @@ config SUNDANCE
 config SUNDANCE_MMIO
 	bool "Use MMIO instead of PIO"
 	depends on SUNDANCE
-	---help---
+	help
 	  Enable memory-mapped I/O for interaction with Sundance NIC registers.
 	  Do NOT enable this by default, PIO (enabled when MMIO is disabled)
 	  is known to solve bugs on certain chips.