soc: qcom: remove unused header files

SMD header file is not used in APR and APR TAL files anymore.
Remove the unused header files from the source code files.

Change-Id: If05d572f7b0148966a2e6c978b34c72fce879c6c
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>