Add support for Comfast CF-N5

Product Page: http://en.comfast.com.cn/index.php?m=content&c=index&a=show&catid=16&id=42

Picture Internal:



Specs:

SoC: MediaTek MT7621 ver:1 eco:3
Flash: 32MB (Winbond 250256JVFQ)
RAM: 512mb (Nanya nt5cc256m16er-ek)
WiFi 2.4ghz: MediaTek MT7603E)
WiFi 5ghz: MediaTek MT7612E
USB: 1 (3.0)
Ethernet ports: 5 port 10/100/1000

Serial Connection: 115200 8N1

Access U-Boot Recovery Web interface: Press and hold the reset button until all 4 Light indicator on router lights sup.
U-Boot Recovery web interface: 192.168.1.1/24

Serial bootlog: https://pastebin.com/g3JEPJtW


Mention anything that I missed, So I can provide if possible;

Here's me hoping that we can finally have a proper OpenWrt support image for this router.