realtek: rtl930x: Add Hasivo s1100wp-8gt-se (excl. PoE)

realtek: rtl930x: Add Hasivo s1100wp-8gt-se (excl. PoE)

This commit adds support for Hasivo S1100WP-8GT-SE switch.

Device specification
--------------------
SoC Type:		Realtek RTL9303
RAM:		Samsung K4B2G1646F-BYMA (256MB DDR3 SDRAM)
Flash:		Fudan FM25Q128A (16 MB)
Ethernet:		8x RTL8221B 10/100/1000/2500Mbps PHY
LEDs:		2 LEDs + 4 LEDs/port
			1x power green (no control)
			1x system green (via RLT9303 GPIO)
			3x RJ45 LEDs/port (via HC595 shift registers on LED spi)
				1x Green
				1x Green/Orange
			1x Orange LED/port for PoE status (below RJ45, on STC8)
Button:		Reset
USB ports:		None
Bootloader:		Realtek U-Boot 2011.12.(3.6.6.55087) (Nov 13 2022 - 14:37:31)
Fan:		None installed (but board provision for temp/FET/fan)
POE:		2x HS104PTI for 802.3af/at/bt PoE (Not yet working)

Installing OpenWrt
------------------
1. UART RJ45 requires soldering a connector to the empty footprint (RJ1).
   (Amphenol RJHSEE380 or similar)
2. Connect to UART 38400@8n1, using Cisco Console Rollover cable (RS232)
3. Set computer IP to 192.168.0.111, and plug in with 2.5Gbps
4. Enter bootloader by pressing esc key during boot
5. Enter password `Hs2021cfgmg`
6. Type `XXXX` to get into U-Boot
7. Type `rtk network on`
8. Use tftp if you have a 2.5G link (other speeds won't work).
   If serial, you can increase baudrate in uboot with `setenv baudrate 115200`
9.1. `tftpboot 0x84f00000 <openwrt-initramfs-filename>`
9.2. Otherwise use serial transfer (Y modem): `loady 0x84f00000`
10. `bootm 0x84f00000`

Now you should be in OpenWRT, and can use sysupgrade to install.

Signed-off-by: Bevan Weiss <bevan.weiss@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/21576
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>