media: atomisp: gmin: Remove GPIO driven regulator support

media: atomisp: gmin: Remove GPIO driven regulator support

The GMIN code has support for sensors using external regulators enabled
by GPIOS, rather then using regulators build into the PMIC.

With the exception of the Trekstor ST70408-4 (1) tablet there are no known
devices which actually use external regulators for the sensors and the code
for this is using deprecated old style GPIO numbers support for which is
going away.

Remove the GPIO driven regulator support so that the gmin code no longer
depends on deprecated GPIO APIs.

1) The GMIN support itself is also deprecated and all sensor drivers still
using it are being moved over to use ACPI + runtime-pm and the ST70408-4
shipped with Android as factory OS and thus will have broken ACPI tables
for the sensors, so like other Android factory OS tablets it will need
a bespoke solution anyways.

Reported-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20241107221134.596149-1-hdegoede@redhat.com
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>