ALSA: ice1724: Allocate resources with device-managed APIs

This patch converts the resource management in PCI ice1724 driver with
devres as a clean up.  Each manual resource management is converted
with the corresponding devres helper, and the card object release is
managed now via card->private_free instead of a lowlevel snd_device.
Along with it, the chip_exit callback chain is moved into the card's
private_free instead of the PCI remove callback, too.

This should give no user-visible functional changes.

Link: https://lore.kernel.org/r/20210715075941.23332-39-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/ice1712/ice1724.c

@@ -2462,7 +2462,7 @@ static int snd_vt1724_create(struct snd_card *card,
 			     struct pci_dev *pci,
 			     const char *modelname)
 {
-	struct snd_ice1712 *ice;
+	struct snd_ice1712 *ice = card->private_data;
 	int err;
 
 	/* enable PCI device */