Documentation/arm/IXP4xx fix a typo

Corrected the word softare to software.

Signed-off-by: Stefan Huber <steffhip@googlemail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/Documentation/arm/IXP4xx b/Documentation/arm/IXP4xx
index 7b9351f..e48b74d 100644
--- a/Documentation/arm/IXP4xx
+++ b/Documentation/arm/IXP4xx
@@ -36,7 +36,7 @@
 - Timers (watchdog, OS)
 
 The following components of the chips are not supported by Linux and
-require the use of Intel's proprietary CSR softare:
+require the use of Intel's proprietary CSR software:
 
 - USB device interface
 - Network interfaces (HSS, Utopia, NPEs, etc)