[source] ar71xx: fix switch port numbering on RB750r2 and RB750UPr2

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/61027e343025b5f47e7e79db71576e6bd5e97c1d

commit 61027e343025b5f47e7e79db71576e6bd5e97c1d
Author: João Chaínho <joaochainho at gmail.com>
AuthorDate: Thu Aug 31 16:45:39 2017 +0100

    ar71xx: fix switch port numbering on RB750r2 and RB750UPr2
    
    This patch fixes the switch port numbering on Mikrotik RB750r2 (hEX lite) and RB750UPr2 (hEX PoE lite).
    Tested on a RB750UPr2. Maybe this patch is applicable to other devices (e.g. RB951Ui-2nD, RB952Ui-5ac2nD) but I have no way to test them.
    
    Signed-off-by: João Chaínho <joaochainho at gmail.com>
---
 target/linux/ar71xx/base-files/etc/board.d/02_network | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/target/linux/ar71xx/base-files/etc/board.d/02_network b/target/linux/ar71xx/base-files/etc/board.d/02_network
index 5889b2b..ba54d89 100755
--- a/target/linux/ar71xx/base-files/etc/board.d/02_network
+++ b/target/linux/ar71xx/base-files/etc/board.d/02_network
@@ -147,8 +147,6 @@ ar71xx_setup_interfaces()
 	om2p-hsv4|\
 	pb42|\
 	pb44|\
-	rb-750-r2|\
-	rb-750up-r2|\
 	rb-951ui-2hnd|\
 	rb-951ui-2nd|\
 	rb-952ui-5ac2nd|\
@@ -160,6 +158,12 @@ ar71xx_setup_interfaces()
 	wrtnode2q)
 		ucidef_set_interfaces_lan_wan "eth1" "eth0"
 		;;
+	rb-750-r2|\
+	rb-750up-r2)
+		ucidef_set_interfaces_lan_wan "eth1.1" "eth0"
+		ucidef_add_switch "switch0" \
+			"0 at eth1" "1:lan:4" "2:lan:3" "3:lan:2" "4:lan:1"
+		;;
 	all0258n|\
 	all0315n|\
 	dlan-hotspot|\