platform_get_irq() returns an error code, but the intel_hdmi_audio
driver ignores it and always returns -ENODEV. This is not correct,
and prevents -EPROBE_DEFER from being propagated properly. Also,
notice that platform_get_irq() no longer returns 0 on error.

Print error message and propagate the return value of platform_get_irq
on failure.
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>