Source code: https://github.com/MeIsReallyBa/mt7615-dbdc-linux5.4

Re-add devices: XiaoMi Wifi R3/R4/AC2100, JDCloud
Signed-off-by: NAmadeusGhost <42570690+AmadeusGhost@users.noreply.github.com>

fix #4922

This reverts commit 82d03e87.

This reverts commit defe460d.

This commit fix sysupgrade failed for bcm27xx.

mt76: fix build
ath10k-ct: rollback to 4.19
Revert "iw/iwinfo/mwlwifi: bump version"
Revert "mac80211/5.4: fix build on kernel 4.9"
Revert "mac80211: switch to upstream owl-loader driver"

arch/arm/boot/dts/qcom-ipq4019-cm520-79f.dtb: Warning (reg_format):
"reg" property in /led_spi/led_gpio@0 has invalid length (4 bytes)
(#address-cells == 1, #size-cells == 1)
arch/arm/boot/dts/qcom-ipq4019-cm520-79f.dtb: Warning
(avoid_default_addr_size): Relying on default #size-cells value for
/led_spi/led_gpio@0
arch/arm/boot/dts/qcom-ipq4019-wpj419.dtb: Warning (reg_format):
/soc/spi@78b5000/flash0@0/partitions/partition@0:reg: property has
invalid length (8 bytes) (#size-cells == 1)
Signed-off-by: NAmadeusGhost <amadeus@jmu.edu.cn>