* ramips: add support for Linksys EA7500 v2

* fix build

* fix build

* update build config

This commit fix switch and image config for Redmi AC2100.
Signed-off-by: NAmadeusGhost <amadeus@jmu.edu.cn>

* ramips: increase HiWiFi HC5962 kernel partition to 4M

Increase kernel partition because 2M is insufficient for 4.19
Because the partition changes, previous version of OpenWrt cannot upgrade to this version
Signed-off-by: NDENG Qingfang <dengqf6@mail2.sysu.edu.cn>

* ramips: use all reserved space for HiWiFi HC5962

Idea was from ad6c6361f9f8 ("ath79: enable all space on Netgear ar9344-based WNDR routers")

These stock partitons: "backup", "hw_panic", "overly", firmware_backup", "opt"
do not contain any device-specific data and can be used for /overlay, resulting in
121M space
Users should erase those partitions with command `mtd erase <partition name>` prior to
upgrading to this version
Signed-off-by: NDENG Qingfang <dengqf6@mail2.sysu.edu.cn>
Co-authored-by: NDENG Qingfang <dengqf6@mail2.sysu.edu.cn>

This commit sync ramips source code from openwrt master.

1. ramips: gsw_mt7621: disable PORT 5 MAC RX/TX flow control by default
2. ramips: allow to set switchdev by board in ramips_set_preinit_iface
3. kernel: fix typos in KernelPackage description

* generic: support mtd-mac-address-ascii

It supports formats of both 001122334455 and 00:11:22:33:44:55
Signed-off-by: NYousong Zhou <yszhou4tech@gmail.com>

* ramips: add JDCloud
Co-authored-by: NYousong Zhou <yszhou4tech@gmail.com>

This may affect wireless and network.

This commit sync ramips from openwrt master, and revert use caldata.sh
so that wireless for some devices can works.

* ramips: XiaoYu-C5 fix to 512MB

* Re-add support for XiaoYu-C5

SoC: MT7621AT
RAM: 256MB
Flash: 16M SPI
Ethernet: 5x GE ports
WiFi: 2.4G: MT7615N
5G: MT7615N

Flash instruction:
1.Modify the file to linux.bin
2.Set up FTP service
3.Computer settings fixed IP: 192.168.179.50 255.255.255.0
4.Turn on the power and press and hold the reset button until the indicator light is on for about 5 seconds.
Signed-off-by: NZhenjian Zhang <itdesk.zhang@gmail.com>

This reverts commit 9cd0dc0d.

Hardware is the same as mir3g
except:
ram 256M ->  128M
switch  lan 2 3  wan 1 ->  lan 1 2 wan 4

pbr-m1固件大小为32m

This reverts commit 506e55be.