regulator: pca9450: Constify static regulator_ops

The only usages of these is to assign their address to the ops field in
the regulator_desc struct, which is a const pointer. Make them const to
allow the compiler to put them in read-only memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Link: https://lore.kernel.org/r/20200913084114.8851-5-rikard.falkeborn@gmail.com


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