regulator: tps6594-regulator: remove interrupt_count

regulator: tps6594-regulator: remove interrupt_count

In .probe() interrupt_count and nr_types is essentially the same. It
contains the number of different interrupt per LDO or buck converter.
Drop one. This is a preparation patch to further simplify the handling
of different variants of this PMIC.

This patch is only compile-time tested.

Signed-off-by: Michael Walle <mwalle@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://patch.msgid.link/20250703113153.2447110-6-mwalle@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>