msm: 8974: Update lookup table entry for HDMI Tx clocks.

Add HDMI Tx controller specific clocks to the clock lookup
structure to link proper HDMI Tx devices with these clocks.

Change-Id: I4acd416944f9bd847a9b6a8a23c2196daccae5f4
Signed-off-by: Ujwal Patel <ujwalp@codeaurora.org>