regmap: regmap_multi_reg_read(): make register list const

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 <rf@opensource.cirrus.com>
Link: https://patch.msgid.link/20241211133558.884669-1-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>