regmap: Implement regmap_multi_reg_read()

regmap_multi_reg_read() is similar to regmap_bilk_read() but reads from
an array of non-sequential registers.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240710015622.1960522-2-linux@roeck-us.net


Signed-off-by: Mark Brown <broonie@kernel.org>