mtd: docg3: fix tracing of IO in writeb

Writeb was incorrectly traced as a 16 bits write, instead of
a 8 bits write. Fix it by tracing the correct width.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Reviewed-by: Ivan Djelic <ivan.djelic@parrot.com>
Reviewed-by: Mike Dunn <mikedunn@newsguy.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/devices/docg3.c

@@ -82,7 +82,7 @@ static inline u16 doc_readw(struct docg3 *docg3, u16 reg)
 static inline void doc_writeb(struct docg3 *docg3, u8 val, u16 reg)
 {
 	writeb(val, docg3->base + reg);
-	trace_docg3_io(1, 16, reg, val);
+	trace_docg3_io(1, 8, reg, val);
 }
 
 static inline void doc_writew(struct docg3 *docg3, u16 val, u16 reg)