soc: qcom: cmd-db: Add cmd_db_read_slave_id() & cmd_db_read_aux_data() functions

soc: qcom: cmd-db: Add cmd_db_read_slave_id() & cmd_db_read_aux_data() functions

Partially reverted commit "soc: qcom: cmd-db: drop unused
functions" by restoring only the cmd_db_read_slave_id() and
cmd_db_read_aux_data() functions, which were removed in that
commit. These functions are required for the RPMH Power Domain
Driver.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Casey Connolly <casey.connolly@linaro.org>
Signed-off-by: Balaji Selvanathan <balaji.selvanathan@oss.qualcomm.com>
Signed-off-by: Aswin Murugan <aswin.murugan@oss.qualcomm.com>
Reviewed-by: Casey Connolly <casey.connolly@linaro.org>> ---
Link: https://patch.msgid.link/20251113113427.2218045-2-aswin.murugan@oss.qualcomm.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>