regmap: fix comment for regmap.use_single_write

Signed-off-by: David Frey <dpfrey@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/base/regmap/internal.h

@@ -149,7 +149,7 @@ struct regmap {
 
 	/* if set, converts bulk read to single read */
 	bool use_single_read;
-	/* if set, converts bulk read to single read */
+	/* if set, converts bulk write to single write */
 	bool use_single_write;
 	/* if set, the device supports multi write mode */
 	bool can_multi_write;