Finally eradicate CONFIG_HOTPLUG

Ever since commit 45f035ab9b ("CONFIG_HOTPLUG should be always on"),
it has been basically impossible to build a kernel with CONFIG_HOTPLUG
turned off.  Remove all the remaining references to it.

Cc: Russell King <linux@arm.linux.org.uk>
Cc: Doug Thompson <dougthompson@xmission.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/ABI/testing/sysfs-bus-pci

@@ -64,7 +64,6 @@ Description:
 		Writing a non-zero value to this attribute will
 		force a rescan of all PCI buses in the system, and
 		re-discover previously removed devices.
-		Depends on CONFIG_HOTPLUG.
 
 What:		/sys/bus/pci/devices/.../msi_irqs/
 Date:		September, 2011
@@ -90,7 +89,6 @@ Contact:	Linux PCI developers <linux-pci@vger.kernel.org>
 Description:
 		Writing a non-zero value to this attribute will
 		hot-remove the PCI device and any of its children.
-		Depends on CONFIG_HOTPLUG.
 
 What:		/sys/bus/pci/devices/.../pci_bus/.../rescan
 Date:		May 2011
@@ -99,7 +97,7 @@ Description:
 		Writing a non-zero value to this attribute will
 		force a rescan of the bus and all child buses,
 		and re-discover devices removed earlier from this
-		part of the device tree.  Depends on CONFIG_HOTPLUG.
+		part of the device tree.
 
 What:		/sys/bus/pci/devices/.../rescan
 Date:		January 2009
@@ -109,7 +107,6 @@ Description:
 		force a rescan of the device's parent bus and all
 		child buses, and re-discover devices removed earlier
 		from this part of the device tree.
-		Depends on CONFIG_HOTPLUG.
 
 What:		/sys/bus/pci/devices/.../reset
 Date:		July 2009