regmap: regmap_multi_reg_read(): make register list const

Mark the list of registers passed into regmap_multi_reg_read() as a
pointer to const. This allows the caller to define the register list
as const data.

This requires making the same change to _regmap_bulk_read(), which is
called by regmap_multi_reg_read().

Signed-off-by: Richard Fitzgerald <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

drivers/base/regmap/regmap.c

···
 EXPORT_SYMBOL_GPL(regmap_fields_read);
 
 static int _regmap_bulk_read(struct regmap *map, unsigned int reg,
-			     unsigned int *regs, void *val, size_t val_count)
+			     const unsigned int *regs, void *val, size_t val_count)
 {
 	u32 *u32 = val;
 	u16 *u16 = val;
···
  * A value of zero will be returned on success, a negative errno will
  * be returned in error cases.
  */
-int regmap_multi_reg_read(struct regmap *map, unsigned int *regs, void *val,
+int regmap_multi_reg_read(struct regmap *map, const unsigned int *regs, void *val,
 			  size_t val_count)
 {
 	if (val_count == 0)

include/linux/regmap.h

···
 		      void *val, size_t val_len);
 int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
 		     size_t val_count);
-int regmap_multi_reg_read(struct regmap *map, unsigned int *reg, void *val,
+int regmap_multi_reg_read(struct regmap *map, const unsigned int *reg, void *val,
 			  size_t val_count);
 int regmap_update_bits_base(struct regmap *map, unsigned int reg,
 			    unsigned int mask, unsigned int val,