sh64: Fix fs.h removal from mm.h regressions.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh64/lib/dbg.c b/arch/sh64/lib/dbg.c
index 4310fc8..97816e0 100644
--- a/arch/sh64/lib/dbg.c
+++ b/arch/sh64/lib/dbg.c
@@ -12,6 +12,7 @@
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/mm.h>
+#include <linux/fs.h>
 #include <asm/mmu_context.h>
 
 typedef u64 regType_t;