Documentation: remove references to /etc/modprobe.conf

Usage of /etc/modprobe.conf file was deprecated by module-init-tools and
is no longer parsed by new kmod tool. References to this file are
replaced in Documentation, comments and Kconfig according to the
context.

There are also some references to the old /etc/modules.conf from 2.4
kernels that are being removed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Documentation/aoe/aoe.txt

@@ -35,7 +35,7 @@ CREATING DEVICE NODES
     sh Documentation/aoe/mkshelf.sh /dev/etherd 0
 
   There is also an autoload script that shows how to edit
-  /etc/modprobe.conf to ensure that the aoe module is loaded when
+  /etc/modprobe.d/aoe.conf to ensure that the aoe module is loaded when
   necessary.
 
 USING DEVICE NODES

Documentation/aoe/autoload.sh

@@ -1,8 +1,8 @@
 #!/bin/sh
 # set aoe to autoload by installing the
-# aliases in /etc/modprobe.conf
+# aliases in /etc/modprobe.d/
 
-f=/etc/modprobe.conf
+f=/etc/modprobe.d/aoe.conf
 
 if test ! -r $f || test ! -w $f; then
 	echo "cannot configure $f for module autoloading" 1>&2