feat(qemu-sbsa): mpidr needs to be present

Coverity Scan reminded that we need to take care of MPIDR properly.
We need to make sure that we get MPIDR values from QEMU.

No MPIDR == panic() in case which should not happen.

Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
Change-Id: Idb5fe7d958f0bcecd3d66a643743f478538f4a8b

plat/qemu/qemu_sbsa/sbsa_sip_svc.c

@@ -103,6 +103,9 @@ void read_cpuinfo_from_dt(void *dtb)
 	while (node > 0) {
 		if (fdt_getprop(dtb, node, "reg", NULL)) {
 			fdt_get_reg_props_by_index(dtb, node, 0, &mpidr, NULL);
+		} else {
+			ERROR("Incomplete information for cpu %d in DeviceTree.\n", cpu);
+			panic();
 		}
 
 		if (fdt_getprop(dtb, node, "numa-node-id", NULL))  {