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/block/Kconfig.iosched b/block/Kconfig.iosched
index 7df1413..2f2158e 100644
--- a/block/Kconfig.iosched
+++ b/block/Kconfig.iosched
@@ -6,13 +6,13 @@
 config MQ_IOSCHED_DEADLINE
 	tristate "MQ deadline I/O scheduler"
 	default y
-	---help---
+	help
 	  MQ version of the deadline IO scheduler.
 
 config MQ_IOSCHED_KYBER
 	tristate "Kyber I/O scheduler"
 	default y
-	---help---
+	help
 	  The Kyber I/O scheduler is a low-overhead scheduler suitable for
 	  multiqueue and other fast devices. Given target latencies for reads and
 	  synchronous writes, it will self-tune queue depths to achieve that
@@ -20,7 +20,7 @@
 
 config IOSCHED_BFQ
 	tristate "BFQ I/O scheduler"
-	---help---
+	help
 	BFQ I/O scheduler for BLK-MQ. BFQ distributes the bandwidth of
 	of the device among all processes according to their weights,
 	regardless of the device parameters and with any workload. It
@@ -32,7 +32,7 @@
        bool "BFQ hierarchical scheduling support"
        depends on IOSCHED_BFQ && BLK_CGROUP
        select BLK_CGROUP_RWSTAT
-       ---help---
+	help
 
        Enable hierarchical scheduling in BFQ, using the blkio
        (cgroups-v1) or io (cgroups-v2) controller.
@@ -40,7 +40,7 @@
 config BFQ_CGROUP_DEBUG
 	bool "BFQ IO controller debugging"
 	depends on BFQ_GROUP_IOSCHED
-	---help---
+	help
 	Enable some debugging help. Currently it exports additional stat
 	files in a cgroup which can be useful for debugging.