doc: fix wrong arch/i386 references

Change all "arch/i386" to "arch/x86" in Documentaion/,
since the directory has changed.

Also update the files which have changed their filename
in the meantime accordingly.

Signed-off-by: Wanlong Gao <wanlong.gao@gmail.com>
[jkosina@suse.cz: reword changelog]
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/Documentation/blockdev/README.DAC960 b/Documentation/blockdev/README.DAC960
index 0e8f618..bd85fb9 100644
--- a/Documentation/blockdev/README.DAC960
+++ b/Documentation/blockdev/README.DAC960
@@ -214,7 +214,7 @@
   make config
   make bzImage (or zImage)
 
-Then install "arch/i386/boot/bzImage" or "arch/i386/boot/zImage" as your
+Then install "arch/x86/boot/bzImage" or "arch/x86/boot/zImage" as your
 standard kernel, run lilo if appropriate, and reboot.
 
 To create the necessary devices in /dev, the "make_rd" script included in