Fix below warning when CONFIG_OF=n:

drivers/regulator/max77826-regulator.c:277:34: warning: ‘max77826_of_match’ defined but not used [-Wunused-const-variable=]
  277 | static const struct of_device_id max77826_of_match[] = {
      |                                  ^~~~~~~~~~~~~~~~~
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20200821111631.4e799c86@xhacker.debianSigned-off-by: Mark Brown <broonie@kernel.org>