ALSA: es1968: Avoid non-standard macro usage

Pass the device pointer from the PCI pointer directly, instead of a
non-standard macro.  The macro didn't give any better readability.

Along with it, the unneeded assignment before snd_dma_alloc_pages*()
call is dropped.

Link: https://lore.kernel.org/r/20191105151856.10785-22-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/es1968.c

@@ -1422,10 +1422,8 @@ snd_es1968_init_dmabuf(struct es1968 *chip)
 	int err;
 	struct esm_memory *chunk;
 
-	chip->dma.dev.type = SNDRV_DMA_TYPE_DEV;
-	chip->dma.dev.dev = snd_dma_pci_data(chip->pci);
 	err = snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV,
-					   snd_dma_pci_data(chip->pci),
+					   &chip->pci->dev,
 					   chip->total_bufsize, &chip->dma);
 	if (err < 0 || ! chip->dma.area) {
 		dev_err(chip->card->dev,