From 5100cd07d43a137ed2e73ecf815ba02f19484a59 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Sat, 15 Feb 2014 10:03:19 +0100
Subject: [PATCH] ALSA: hda/realtek - Allow NULL bus->pci

Realtek codec driver contains some codes referring to the PCI
subdevice IDs, but most of them are optional, typically for checking
the codec name variants.  Add NULL checks appropriately so that it can
work without PCI assignment.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
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