drm/i915/audio: remove misleading checks for !eld[0]

We'll never end up in the hooks with eld[0] unset, as that's checked by
drm_select_eld().

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_audio.c

@@ -79,9 +79,6 @@ static bool intel_eld_uptodate(struct drm_connector *connector,
 	tmp = I915_READ(reg_eldv);
 	tmp &= bits_eldv;
 
-	if (!eld[0])
-		return !tmp;
-
 	if (!tmp)
 		return false;
 
@@ -123,9 +120,6 @@ static void g4x_audio_codec_enable(struct drm_connector *connector,
 	len = (tmp >> 9) & 0x1f;		/* ELD buffer size */
 	I915_WRITE(G4X_AUD_CNTL_ST, tmp);
 
-	if (!eld[0])
-		return;
-
 	len = min_t(int, eld[2], len);
 	DRM_DEBUG_DRIVER("ELD size %d\n", len);
 	for (i = 0; i < len; i++)
@@ -207,9 +201,6 @@ static void hsw_audio_codec_enable(struct drm_connector *connector,
 	tmp &= ~eldv;
 	I915_WRITE(aud_cntrl_st2, tmp);
 
-	if (!eld[0])
-		return;
-
 	tmp = I915_READ(aud_cntl_st);
 	tmp &= ~IBX_ELD_ADDRESS;
 	I915_WRITE(aud_cntl_st, tmp);
@@ -304,9 +295,6 @@ static void ilk_audio_codec_enable(struct drm_connector *connector,
 	tmp &= ~eldv;
 	I915_WRITE(aud_cntrl_st2, tmp);
 
-	if (!eld[0])
-		return;
-
 	tmp = I915_READ(aud_cntl_st);
 	tmp &= ~IBX_ELD_ADDRESS;
 	I915_WRITE(aud_cntl_st, tmp);