regulator: maxim,max8973: Drop Tegra specifics from example

There's no need to complicate examples with a platform specific macro.
It also complicates example parsing to figure out the number of interrupt
cells in examples (based on the bracketing).

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20220126231250.1635021-1-robh@kernel.org


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