ALSA: hda - add quirk to detect CD input on Gigabyte EP45-DS3

My CD input got lost in commit 68ef0561

.
Raymond helped me to add the necessary pin fixup to make it appear again. In
fact, this is basically his patch. It fixes alsa bug #5541.

Signed-off-by: Marton Balint <cus@passwd.hu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>