ALSA: hda - Don't turn off EAPD for headphone on Lenovo N100

The only EAPD on AD1986A is on NID 0x1b where usually the speaker.
But this doesn't control only the speaker amp but may influence on all
outputs, e.g. Lenovo N100 laptop seems to have this issue.

Cc: <stable@vger.kernel.org>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_analog.c

@@ -219,8 +219,12 @@ static int alloc_ad_spec(struct hda_codec *codec)
 static void ad_fixup_inv_jack_detect(struct hda_codec *codec,
 				     const struct hda_fixup *fix, int action)
 {
-	if (action == HDA_FIXUP_ACT_PRE_PROBE)
+	struct ad198x_spec *spec = codec->spec;
+
+	if (action == HDA_FIXUP_ACT_PRE_PROBE) {
 		codec->inv_jack_detect = 1;
+		spec->gen.keep_eapd_on = 1;
+	}
 }
 
 enum {