Create/use more directory structure in the Documentation/ tree.

Create Documentation/blockdev/ sub-directory and populate it.
Populate the Documentation/serial/ sub-directory.
Move MSI-HOWTO.txt to Documentation/PCI/.
Move ioctl-number.txt to Documentation/ioctl/.
Update all relevant 00-INDEX files.
Update all relevant Kconfig files and source files.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
diff --git a/Documentation/ioctl/00-INDEX b/Documentation/ioctl/00-INDEX
new file mode 100644
index 0000000..d2fe4d4
--- /dev/null
+++ b/Documentation/ioctl/00-INDEX
@@ -0,0 +1,10 @@
+00-INDEX
+	- this file
+cdrom.txt
+	- summary of CDROM ioctl calls
+hdio.txt
+	- summary of HDIO_ ioctl calls
+ioctl-decoding.txt
+	- how to decode the bits of an IOCTL code
+ioctl-number.txt
+	- how to implement and register device/driver ioctl calls