missing includes in mlx4

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Jeff Garzik <jeff@garzik.org>
Acked-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/net/mlx4/icm.c b/drivers/net/mlx4/icm.c
index e96feae..b7a4aa8 100644
--- a/drivers/net/mlx4/icm.c
+++ b/drivers/net/mlx4/icm.c
@@ -33,6 +33,7 @@
 
 #include <linux/init.h>
 #include <linux/errno.h>
+#include <linux/mm.h>
 
 #include <linux/mlx4/cmd.h>