mpc86xx: protect memcpy to bad address if a mac-address is missing from dt

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Jon Loeliger <jdl@freescale.com>

cpu/mpc86xx/cpu.c

@@ -280,22 +280,26 @@ ft_cpu_setup(void *blob, bd_t *bd)
 
 #if defined(CONFIG_MPC86XX_TSEC1)
 	p = ft_get_prop(blob, "/" OF_SOC "/ethernet@24000/mac-address", &len);
-	memcpy(p, bd->bi_enetaddr, 6);
+	if (p != NULL)
+		memcpy(p, bd->bi_enetaddr, 6);
 #endif
 
 #if defined(CONFIG_MPC86XX_TSEC2)
 	p = ft_get_prop(blob, "/" OF_SOC "/ethernet@25000/mac-address", &len);
-	memcpy(p, bd->bi_enet1addr, 6);
+	if (p != NULL)
+		memcpy(p, bd->bi_enet1addr, 6);
 #endif
 
 #if defined(CONFIG_MPC86XX_TSEC3)
 	p = ft_get_prop(blob, "/" OF_SOC "/ethernet@26000/mac-address", &len);
-	memcpy(p, bd->bi_enet2addr, 6);
+	if (p != NULL)
+		memcpy(p, bd->bi_enet2addr, 6);
 #endif
 
 #if defined(CONFIG_MPC86XX_TSEC4)
 	p = ft_get_prop(blob, "/" OF_SOC "/ethernet@27000/mac-address", &len);
-	memcpy(p, bd->bi_enet3addr, 6);
+	if (p != NULL)
+		memcpy(p, bd->bi_enet3addr, 6);
 #endif
 
 }