x86: Add APU3 reference to x86 board.d

There is a new APU-model available, APU3. The device is configured in
the same way as the APU1 and APU2, so the same LED/network setup can be
used.

I considered changing the case to pc-engines-apu*, but I chose to follow
the existing pattern and add the full board name.

Signed-off-by: Kristian Evensen <kristian.evensen@gmail.com>

target/linux/x86/base-files/etc/board.d/01_leds

@@ -8,7 +8,7 @@
 board_config_update
 
 case "$(board_name)" in
-pc-engines-apu|pc-engines-apu2)
+pc-engines-apu|pc-engines-apu2|pc-engines-apu3)
 	ucidef_set_led_netdev "wan" "WAN" "apu2:green:led3" "eth0"
 	ucidef_set_led_netdev "lan" "LAN" "apu2:green:led2" "br-lan"
 	ucidef_set_led_default "diag" "DIAG" "apu2:green:power" "1"

target/linux/x86/base-files/etc/board.d/02_network

@@ -9,7 +9,7 @@
 board_config_update
 
 case "$(board_name)" in
-pc-engines-apu|pc-engines-apu2)
+pc-engines-apu|pc-engines-apu2|pc-engines-apu3)
 	ucidef_set_interfaces_lan_wan "eth1 eth2" "eth0"
 	;;
 traverse-technologies-geos)