PCI: doc/pci: create Documentation/PCI/ and move files into it

Create Documentation/PCI/ and move PCI-related files to it.
Fix a few instances of trailing whitespace.
Update references to the new file locations.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/Documentation/PCI/00-INDEX b/Documentation/PCI/00-INDEX
new file mode 100644
index 0000000..49f4394
--- /dev/null
+++ b/Documentation/PCI/00-INDEX
@@ -0,0 +1,12 @@
+00-INDEX
+	- this file
+PCI-DMA-mapping.txt
+	- info for PCI drivers using DMA portably across all platforms
+PCIEBUS-HOWTO.txt
+	- a guide describing the PCI Express Port Bus driver
+pci-error-recovery.txt
+	- info on PCI error recovery
+pci.txt
+	- info on the PCI subsystem for device driver authors
+pcieaer-howto.txt
+	- the PCI Express Advanced Error Reporting Driver Guide HOWTO