Use MAC from EEPROM for Interfaces (#329)

* Use MAC from EEPROM for Interfaces

Signed-off-by: Andriy Moroz <c_andriym@mellanox.com>

* Use platform MAC from DB

Signed-off-by: Andriy Moroz <c_andriym@mellanox.com>

syncd/scripts/syncd_init_common.sh

@@ -54,7 +54,7 @@ config_syncd_mlnx()
     [ -e /dev/sxdevs/sxcdev ] || ( mkdir -p /dev/sxdevs && mknod /dev/sxdevs/sxcdev c 231 193 )
 
     # Read MAC address and align the last 6 bits.
-    MAC_ADDRESS=$(ip link show eth0 | grep ether | awk '{print $2}')
+    MAC_ADDRESS=$(sonic-cfggen -d -v DEVICE_METADATA.localhost.mac)
     last_byte=$(python -c "print '$MAC_ADDRESS'[-2:]")
     aligned_last_byte=$(python -c "print format(int(int('$last_byte', 16) & 0b11000000), '02x')")  # put mask and take away the 0x prefix
     ALIGNED_MAC_ADDRESS=$(python -c "print '$MAC_ADDRESS'[:-2] + '$aligned_last_byte'")          # put aligned byte into the end of MAC