ALSA: hda - Rename reg access ops in hda_controller_ops

Using readl, writel, etc. resulted in some architectures, such as
s390, expanding the member names into zpci_writel.  Obviously not the
intended result.

Fixes s390 build breakage introduced by "4083081 - ALSA: hda - Allow
different ops to read/write registers"

Signed-off-by: Dylan Reid <dgreid@chromium.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index b26eff3..149c00b 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1537,12 +1537,12 @@
 }
 
 static const struct hda_controller_ops pci_hda_ops = {
-	.writel = pci_azx_writel,
-	.readl = pci_azx_readl,
-	.writew = pci_azx_writew,
-	.readw = pci_azx_readw,
-	.writeb = pci_azx_writeb,
-	.readb = pci_azx_readb,
+	.reg_writel = pci_azx_writel,
+	.reg_readl = pci_azx_readl,
+	.reg_writew = pci_azx_writew,
+	.reg_readw = pci_azx_readw,
+	.reg_writeb = pci_azx_writeb,
+	.reg_readb = pci_azx_readb,
 	.disable_msi_reset_irq = disable_msi_reset_irq,
 	.dma_alloc_pages = dma_alloc_pages,
 	.dma_free_pages = dma_free_pages,