ALSA: hda - disable amp override on non-HP machines

Some machines with Cx5045 seem to have no problem with the volume
over 0dB on NID 0x17.  Disable amp overrides for other devices but HP.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/pci/hda/patch_conexant.c

@@ -1005,7 +1005,9 @@ static int patch_cxt5045(struct hda_codec *codec)
 #endif	
 	}
 
-	/*
+	switch (codec->subsystem_id >> 16) {
+	case 0x103c:
+		/* HP laptop has a really bad sound over 0dB on NID 0x17.
 		 * Fix max PCM level to 0 dB
 		 * (originall it has 0x2b steps with 0dB offset 0x14)
 		 */
@@ -1014,6 +1016,8 @@ static int patch_cxt5045(struct hda_codec *codec)
 					  (0x14 << AC_AMPCAP_NUM_STEPS_SHIFT) |
 					  (0x05 << AC_AMPCAP_STEP_SIZE_SHIFT) |
 					  (1 << AC_AMPCAP_MUTE_SHIFT));
+		break;
+	}
 
 	return 0;
 }