missing mm.h in fw-ohci

need it for page_private(), not all targets have it pulled indirectly

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index 1f5c704..c17342d 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -26,6 +26,7 @@
 #include <linux/delay.h>
 #include <linux/poll.h>
 #include <linux/dma-mapping.h>
+#include <linux/mm.h>
 
 #include <asm/uaccess.h>
 #include <asm/semaphore.h>