ALSA: hda/cirrus_scodec_test: Fix incorrect setup of gpiochip

ALSA: hda/cirrus_scodec_test: Fix incorrect setup of gpiochip

[ Upstream commit c5e96e54eca3876d4ce8857e2e22adbe9f44f4a2 ]

Set gpiochip parent to the struct device of the dummy GPIO driver
so that the software node will be associated with the GPIO chip.

The recent commit e5d527be7e698 ("gpio: swnode: don't use the
swnode's name as the key for GPIO lookup") broke cirrus_scodec_test,
because the software node no longer gets associated with the GPIO
driver by name.

Instead, setting struct gpio_chip.parent to the owning struct device
will find the node using a normal fwnode lookup.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Fixes: 2144833e7b414 ("ALSA: hda: cirrus_scodec: Add KUnit test")
Link: https://patch.msgid.link/20260113130954.574670-1-rf@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>