samples: ipc: openamp_rsc_table: conditional virtio ID sent on IPM device

Some IPM devices return an error if we request to transfer data.
Use IPM_MAX_DATA_SIZE to determine if the virtio ID can be transferred
through the IPM device.
Send data to IPM only if CONFIG_IPM_MAX_DATA_SIZE is not zero.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>

Author: arnopo

samples/subsys/ipc/openamp_rsc_table/src/main_remote.c

@@ -31,6 +31,13 @@ LOG_MODULE_REGISTER(openamp_rsc_table);
 #error "Sample requires definition of shared memory for rpmsg"
 #endif
 
+#if CONFIG_IPM_MAX_DATA_SIZE > 0
+
+#define	IPM_SEND(dev, w, id, d, s) ipm_send(dev, w, id, d, s)
+#else
+#define IPM_SEND(dev, w, id, d, s) ipm_send(dev, w, id, NULL, 0)
+#endif
+
 /* Constants derived from device tree */
 #define SHM_NODE		DT_CHOSEN(zephyr_ipc_shm)
 #define SHM_START_ADDR	DT_REG_ADDR(SHM_NODE)
@@ -133,7 +140,7 @@ int mailbox_notify(void *priv, uint32_t id)
 	ARG_UNUSED(priv);
 
 	LOG_DBG("%s: msg received", __func__);
-	ipm_send(ipm_handle, 0, id, &id, 4);
+	IPM_SEND(ipm_handle, 0, id, &id, 4);
 
 	return 0;
 }