[ARM] 3052/1: add ixp2000 microcode loader

Patch from Lennert Buytenhek

This patch adds a microcode loader for the ixp2000 architecture.

The ixp2000 is an xscale-based CPU with a number of additional small
CPUs ('microengines') on die that can be programmed to do various
things.  Depending on the ixp2000 model, there are between 2 and 16
microengines.

This code provides an API that allows configuring the microengines,
loading code into them, and starting and stopping them and reading
out a number of status registers, and is used by the microengine
network driver that was recently announced to netdev.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-ixp2000/Makefile

@@ -1,7 +1,7 @@
 #
 # Makefile for the linux kernel.
 #
-obj-y			:= core.o pci.o
+obj-y			:= core.o pci.o uengine.o
 obj-m			:=
 obj-n			:=
 obj-			:=