Fix below warning when CONFIG_OF=n:

drivers/regulator/sy8106a-regulator.c:126:34: warning: ‘sy8106a_i2c_of_match’ defined but not used [-Wunused-const-variable=]
  126 | static const struct of_device_id sy8106a_i2c_of_match[] = {
      |                                  ^~~~~~~~~~~~~~~~~~~~
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20200821111820.5c6ddb04@xhacker.debianSigned-off-by: Mark Brown <broonie@kernel.org>