Use shiny new acpi_dev_present() and remove all the boilerplate
to search for a particular ACPI device. No functional change.
Cf. 2d12b6b3 ("ACPI / utils: Add acpi_dev_present()").
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Acked-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>