media: ov08x40: Get reset GPIO and regulators on ACPI platforms too

ACPI platforms might also have a reset GPIO and regulators, move the code
to get these outside of the if (!is_acpi_node(fwnode)) check.

This also removes the is_acpi_node(fwnode) checks from ov08x40_power_on() /
ov08x40_power_off() both the GPIO hand the clk frameworks functions used
there will happily accept the NULL pointer returned from the optional get()
functions when there is no reset GPIO / no clk.

While moving the code around also at error logging to the error exit
path for getting the reset GPIO.

Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>