ASoC: msm-hdmi-codec-rx: update check for HDMI core state

HDMI Tx core driver API "hdmi_cable_status" returns 0
if cable is not connected and returns "1" if cable is
connected. Audio session should only be started when
HDMI cable status is "1". Update HDMI codec driver to
have this status correctly conveyed to HDMI audio
sessions on startup to notify the active audio session
not to proceed with HDMI audio settings any further.

Change-Id: Iabe450c28ac2ff5463a1f7d6dbb6c31b5ff1d80c
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>