[PATCH] s2io build fix

Damir Perisa <damir.perisa@solnet.ch> reports:

 drivers/net/s2io.h:765: error: invalid lvalue in assignment
 drivers/net/s2io.h:766: error: invalid lvalue in assignment

That's a gcc4 error.  I don't see why the casts are there anyway..

Cc: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
diff --git a/drivers/net/s2io.h b/drivers/net/s2io.h
index 5d92707..bc64d96 100644
--- a/drivers/net/s2io.h
+++ b/drivers/net/s2io.h
@@ -762,8 +762,8 @@
 {
 	u64 ret = 0;
 	ret = readl(addr + 4);
-	(u64) ret <<= 32;
-	(u64) ret |= readl(addr);
+	ret <<= 32;
+	ret |= readl(addr);
 
 	return ret;
 }