regmap: Mark reg_defaults in regmap_multi_reg_write as const

There should be no need for the writes supplied to this function to be
edited by it so mark them as const.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 6e19560..1e3934a 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1592,8 +1592,8 @@
  * A value of zero will be returned on success, a negative errno will
  * be returned in error cases.
  */
-int regmap_multi_reg_write(struct regmap *map, struct reg_default *regs,
-				int num_regs)
+int regmap_multi_reg_write(struct regmap *map, const struct reg_default *regs,
+			   int num_regs)
 {
 	int ret = 0, i;
 
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 4149f1a..e97ac6c 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -386,7 +386,7 @@
 		     const void *val, size_t val_len);
 int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
 			size_t val_count);
-int regmap_multi_reg_write(struct regmap *map, struct reg_default *regs,
+int regmap_multi_reg_write(struct regmap *map, const struct reg_default *regs,
 			int num_regs);
 int regmap_raw_write_async(struct regmap *map, unsigned int reg,
 			   const void *val, size_t val_len);