drivers: soc: qcom: scmi_clients: add zero initialized entry in id table

SCMI core framework match id function expects zero initialized entry at
the end of id_match table. Add zero initialized entries in both memlat
and plh scmi client drivers.

Change-Id: I268ffc48fa07a42a052ea45c160f1e2ab21994ff
Signed-off-by: Santosh Mardi <gsantosh@codeaurora.org>