ARM: dts: msm: Add support for HDMI Tx controller on apq8084

Add support for HDMI_Tx controller on apq8084 platform by providing
regulator, power, hpd, cec, ddc etc HDMI related settings in dtsi.

For MTP platform, HDMI will be disabled by default.

Change-Id: I91746630679abd1396a6a929fd464e0e53283626
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>