ACPI: Make AC and battery drivers available on !X86

ACPI battery and AC devices can be found in arm64 laptops as well,
so drop the Kconfig dependency on X86 for their drivers.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>