asoc: codecs: add object to compile audio hdmi codec driver

HDMI codec driver is not compiling as the corresponding object
file is not set in the makefile.
Add object file to SND_SOC_MSM_HDMI_CODEC_RX config.

Change-Id: I6068f551db357e5bfa73ff5b51014347f38b925c
Signed-off-by: Shiv Maliyappanahalli <smaliyap@codeaurora.org>