ALSA: hda - Set up GPIO for Toshiba Satellite S50D

Toshiba Satellite S50D laptop with an IDT codec uses the GPIO4 (0x10)
as the master EAPD.

Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=915858


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