platform/x86: acer-wmi: Depend on ACPI_VIDEO instead of selecting it

"select ACPI_VIDEO" cause recursive dependency when "depends on HWMON"
is added:

drivers/hwmon/Kconfig:6:error: recursive dependency detected!
drivers/hwmon/Kconfig:6: symbol HWMON is selected by EEEPC_LAPTOP
drivers/platform/x86/Kconfig:326: symbol EEEPC_LAPTOP depends on ACPI_VIDEO
drivers/acpi/Kconfig:208: symbol ACPI_VIDEO is selected by ACER_WMI
drivers/platform/x86/Kconfig:173: symbol ACER_WMI depends on HWMON

Replace the select with depends on to avoid this problem when the next
patch in this series adds "depends on HWMON".

There is a stub defined for the used acpi_video_get_backlight_type()
function when ACPI_VIDEO is not set, so use:

        depends on ACPI_VIDEO || ACPI_VIDEO = n

Signed-off-by: SungHwan Jung <onenowy@gmail.com>
Link: https://lore.kernel.org/r/20231124094122.100707-4-onenowy@gmail.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>