Fix below warnings when CONFIG_OF=n:

drivers/regulator/fixed.c:48:36: warning: ‘fixed_clkenable_data’ defined but not used [-Wunused-const-variable=]
   48 | static const struct fixed_dev_type fixed_clkenable_data = {
      |                                    ^~~~~~~~~~~~~~~~~~~~
drivers/regulator/fixed.c:44:36: warning: ‘fixed_voltage_data’ defined but not used [-Wunused-const-variable=]
   44 | static const struct fixed_dev_type fixed_voltage_data = {
      |                                    ^~~~~~~~~~~~~~~~~~
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20200821111403.3e8b58a3@xhacker.debianSigned-off-by: Mark Brown <broonie@kernel.org>