drm/i915: Rename SDVO_AUDIO_ENABLE to HDMI_AUDIO_ENABLE

The "audio enable" bit on the SDVO/HDMI control register is only meant
for HDMI. Audio is never delivered over the SDVO bus. Rename the define
to reflect this fact.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190409144054.24561-4-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 8778f56..dcf3c4d 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4557,7 +4557,7 @@ enum {
 #define   HDMI_MODE_SELECT_HDMI			(1 << 9) /* HDMI only */
 #define   HDMI_MODE_SELECT_DVI			(0 << 9) /* HDMI only */
 #define   HDMI_COLOR_RANGE_16_235		(1 << 8) /* HDMI only */
-#define   SDVO_AUDIO_ENABLE			(1 << 6)
+#define   HDMI_AUDIO_ENABLE			(1 << 6) /* HDMI only */
 /* VSYNC/HSYNC bits new with 965, default is to be set */
 #define   SDVO_VSYNC_ACTIVE_HIGH		(1 << 4)
 #define   SDVO_HSYNC_ACTIVE_HIGH		(1 << 3)