msm_fb: HDMI: Add support for hdmi_audio switch node
- Add switch device node for hdmi audio on initialization.
- Final node path will be /devices/virtual/switch/hdmi_audio
- Set the node state to 1 when the HDMI EDID for the sink
supports audio
- Set the node state to 0 otherwise(DVI)
Signed-off-by:
Arun Kumar K.R <akumarkr@codeaurora.org>
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