docs: blockdev: convert to ReST

Rename the blockdev documentation files to ReST, add an
index for them and adjust in order to produce a nice html
output via the Sphinx build system.

The drbd sub-directory contains some graphs and data flows.
Add those too to the documentation.

At its new index.rst, let's add a :orphan: while this is not linked to
the main index.rst file, in order to avoid build warnings.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index b933a7eea52b..5c99e52f9dc1 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -4424,7 +4424,7 @@ static int __init floppy_setup(char *str)
 		pr_cont("\n");
 	} else
 		DPRINT("botched floppy option\n");
-	DPRINT("Read Documentation/blockdev/floppy.txt\n");
+	DPRINT("Read Documentation/blockdev/floppy.rst\n");
 	return 0;
 }