realtek: rtl838x: add Netgear GS110TUP v1 support

The GS110TUP v1 is a managed switch similar to the GS110TPP v1, but with
port 10 as SFP instead of RJ-45 and a total budget of 240 watts. Ports
1-4 support 60-watt 802.3bt PoE and ports 5-8 support 30-watt 802.3at.

The flash layout of the two switches are identical, and the U-Boot
configurations are the same except for having a different magic number,
so installation can be done via the same U-Boot method.

The following command will be needed to enable the port LEDs as per
https://forum.openwrt.org/t/72510/51 :
    fw_setenv bootcmd "rtk network on; boota"

Additionally, port 9 (1000base-T from a separate QSGMII PHY) does not
function without this. Port 10 was not tested as no SFP module was
available.

Signed-off-by: Jacob Potter <jacob@j4cbo.com>
[rebase on merged flash layout]
Signed-off-by: Sander Vanheule <sander@svanheule.net>

target/linux/realtek/image/rtl838x.mk

@@ -171,6 +171,24 @@ define Device/netgear_nge
   DEVICE_VENDOR := NETGEAR
 endef
 
+# "NGG" refers to the uImage magic
+define Device/netgear_ngg
+  KERNEL := \
+	kernel-bin | \
+	append-dtb | \
+	lzma | \
+	uImage lzma
+  KERNEL_INITRAMFS := \
+	kernel-bin | \
+	append-dtb | \
+	lzma | \
+	uImage lzma
+  SOC := rtl8380
+  IMAGE_SIZE := 14848k
+  UIMAGE_MAGIC := 0x4e474720
+  DEVICE_VENDOR := NETGEAR
+endef
+
 define Device/netgear_gs108t-v3
   $(Device/netgear_nge)
   DEVICE_MODEL := GS108T
@@ -186,6 +204,14 @@ define Device/netgear_gs110tpp-v1
 endef
 TARGET_DEVICES += netgear_gs110tpp-v1
 
+define Device/netgear_gs110tup-v1
+  $(Device/netgear_ngg)
+  DEVICE_MODEL := GS110TUP
+  DEVICE_VARIANT := v1
+  DEVICE_PACKAGES += realtek-poe
+endef
+TARGET_DEVICES += netgear_gs110tup-v1
+
 define Device/netgear_gs308t-v1
   $(Device/netgear_nge)
   DEVICE_MODEL := GS308T