mfd: pm8008: Rework to match new DT binding

mfd: pm8008: Rework to match new DT binding

Rework the pm8008 driver to match the new devicetree binding which no
longer describes internal details like interrupts and register offsets
(including which of the two consecutive I2C addresses the registers
belong to).

Instead make the interrupt controller implementation internal and pass
interrupts to the subdrivers using MFD cell resources.

Note that subdrivers may either get their resources, like register block
offsets, from the parent MFD or this can be included in the subdrivers
directly.

In the current implementation, the temperature alarm driver is generic
enough to just get its base address and alarm interrupt from the parent
driver, which already uses this information to implement the interrupt
controller.

The regulator driver, however, needs additional information like parent
supplies and regulator characteristics so in that case it is easier to
just augment its table with the regulator register base addresses.

Similarly, the current GPIO driver already holds the number of pins and
that lookup table can therefore also be extended with register offsets.

Note that subdrivers can now access the two regmaps by name, even if the
primary regmap is registered last so that it is returned by default when
no name is provided in lookups.

Finally, note that the temperature alarm and GPIO subdrivers need some
minor rework before they can be used with non-SPMI devices like the
PM8008. The temperature alarm MFD cell name specifically uses a "qpnp"
rather than "spmi" prefix to prevent binding until the driver has been
updated.

Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20240608155526.12996-11-johan+linaro@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>