meta-ampere: mtjade: network: use sync-mac for MAC from FRU

Switch to use phosphor-networkd's sync-mac feature to get and use MAC
address from FRU, replacing Ampere approach.

Tested:
1. Boot the BMC to Linux and login to console
2. Get BMC MAC address in FRU
$ ipmitool fru print 0 | grep "Board Extra"
 Board Extra           : 70:E2:84:8F:E3:56
3. Check eth0 HWaddr with MAC in FRU
$ ifconfig eth1 | grep HWaddr
eth1      Link encap:Ethernet  HWaddr 70:E2:84:8F:E3:56

Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Signed-off-by: Khang Nguyen <khangng@amperecomputing.com>
Change-Id: I7121fde2f7b8d673e3ae0b1e5a03f175a10ea578
diff --git a/meta-ampere/meta-jade/recipes-phosphor/network/phosphor-network/config.json b/meta-ampere/meta-jade/recipes-phosphor/network/phosphor-network/config.json
new file mode 100644
index 0000000..14ef18c
--- /dev/null
+++ b/meta-ampere/meta-jade/recipes-phosphor/network/phosphor-network/config.json
@@ -0,0 +1,3 @@
+{
+    "eth1": ""
+}