msm8974: mhl_sii8334: init chip in D3

MHL Tx chipset is set to low power during chip
initialization. In open-drain mode, mhl tx releases
the upstream HPD line. Set ID and data lines by
default in USB mode during initial power state.
Delay setting the chipset into low power mode until
MHL HPD STAT interrupt has occurred, this is the true
reflection of hpd state. This change also sets the hardware
to mirror cbus hpd state in driver.

Change-Id: I65e0b4c1a3e6a4eadd20cbc46c5209d748aacd13
Signed-off-by: Manoj Rao <manojraj@codeaurora.org>