regulator: max77650: add of_match table

We need the of_match table if we want to use the compatible string in
the pmic's child node and get the regulator driver loaded automatically.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20191210100725.11005-1-brgl@bgdev.pl


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