mfd: Off by one calculating size for timberdale

I'm pretty sure that it should be + 1 here.  It's an off by one, because
we start counting at zero.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Richard Röjfors <richard.rojfors@pelagicore.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/timberdale.h b/drivers/mfd/timberdale.h
index 8d27ffa..902c451 100644
--- a/drivers/mfd/timberdale.h
+++ b/drivers/mfd/timberdale.h
@@ -66,7 +66,7 @@
 
 #define CHIPCTLOFFSET	0x800
 #define CHIPCTLEND	0x8ff
-#define CHIPCTLSIZE	(CHIPCTLEND - CHIPCTLOFFSET)
+#define CHIPCTLSIZE	(CHIPCTLEND - CHIPCTLOFFSET + 1)
 
 #define INTCOFFSET	0xc00
 #define INTCEND		0xfff