ARM: add an extra temp register to the low level debugging addruart macro

Some platforms (like OMAP not to name it) are doing rather complicated
hacks just to determine the base UART address to use.  Let's give their
addruart macro some slack by providing an extra work register which will
allow for much needed cleanups.

This is basically a no-op as this commit is only adding the extra argument
to the macro but no one is using it yet.

Signed-off-by: nicolas Pitre <nicolas.pitre@linaro.org>
Reviewed-by: Kevin Hilman <khilman@ti.com>
diff --git a/arch/arm/mach-ixp4xx/include/mach/debug-macro.S b/arch/arm/mach-ixp4xx/include/mach/debug-macro.S
index b974a49..8c9f8d5 100644
--- a/arch/arm/mach-ixp4xx/include/mach/debug-macro.S
+++ b/arch/arm/mach-ixp4xx/include/mach/debug-macro.S
@@ -10,7 +10,7 @@
  * published by the Free Software Foundation.
 */
 
-                .macro  addruart, rp, rv
+                .macro  addruart, rp, rv, tmp
 #ifdef __ARMEB__
                 mov     \rp, #3         @ Uart regs are at off set of 3 if
 					@ byte writes used - Big Endian.