drm/i2c: tda998x: fix audio muting

Fix a bug that was introduced in commit c4c11dd160a8 ("drm/i2c: tda998x:
add video and audio input configuration") when Sebastian cleaned up my
original patch. Without this being fixed, audio is muted when the
display is turned off, never to be re-enabled.

Signed-off-by: Russell King <[e-mail]>
Cc: Sebastian Hesselbarth <[e-mail]>
Cc: Darren Etheridge <[e-mail]>
Cc: Dave Airlie <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/gpu/drm/i2c/tda998x_drv.c

···
 		reg_write(encoder, REG_VIP_CNTRL_2, priv->vip_cntrl_2);
 		break;
 	case DRM_MODE_DPMS_OFF:
-		/* disable audio and video ports */
-		reg_write(encoder, REG_ENA_AP, 0x00);
+		/* disable video ports */
 		reg_write(encoder, REG_ENA_VP_0, 0x00);
 		reg_write(encoder, REG_ENA_VP_1, 0x00);
 		reg_write(encoder, REG_ENA_VP_2, 0x00);