This commit add support for the yyets_le router.

Hardware Highlights:

SoC:	  Qualcomm IPQ4019 717 MHz
RAM:	  512M NT5CC256M16ER-EK
Flash:    32M SPI NOR MX25L25635F
WIFI1:    2.4 GHz 2T2R integrated
WIFI2:    5 GHz 2T2R integrated
Ethernet: Qualcomm QCA8075 (4x LAN, 1x WAN)
USB:      1x 3.0
LEDS:     power, wlan2g, wlan5g, usb
Button:   Reset

Installation:
 Upload the firmware on the upgrade page of the stcok, and this will
 take a few minutes.

This commit also supports the addition of a 128M nand flash version,
just use the P&W R619AC's OpBoot to overwrite the original uboot.
Signed-off-by: NAmadeusGhost <amadeus@jmu.edu.cn>

RT-AC1300UHP has 256M memory and does not need to use ath10k-ct-smallbuffers.
Signed-off-by: NAmadeusGhost <42570690+AmadeusGhost@users.noreply.github.com>

Using ath10k-ct-smallbuffers instead of ath10k, avoid memory explosion.
Signed-off-by: NAmadeusGhost <42570690+AmadeusGhost@users.noreply.github.com>

From LGA1150 dalao (https://github.com/LGA1150/openwrt)

Warning: The compiled firmware only supports flashing under OpBoot.

MobiPromo CM520-79F is an AC1300 dual band router based on IPQ4019

Specification:

SoC/Wireless: QCA IPQ4019
RAM: 512MiB
Flash: 128MiB SLC NAND
Ethernet PHY: QCA8075
Ethernet ports: 1x WAN, 2x LAN
LEDs: 7 LEDs
      2 (USB, CAN) are GPIO
            other 5 (2.4G, 5G, LAN1, LAN2, WAN) are connected to a shift
	    register
Signed-off-by: NDENG Qingfang <dengqf6@mail2.sysu.edu.cn>

ipq40xx: fix build error for cm520-79f (#30)

This commit fix 94a743ea531b4c10e91c17dc17535471e95f308b
Signed-off-by: NAmadeusGhost <amadeus@jmu.edu.cn>

CM520-79F: fix wan port (#33)

This commit fix 223124e
Signed-off-by: NAmadeusGhost <amadeus@jmu.edu.cn>

CM520-79F: disable vlan
Co-authored-by: NAmadeusGhost <42570690+AmadeusGhost@users.noreply.github.com>

This reverts commit 2289184a.

* delete r619ac sd gpio

* ipq40xx: add p2w-r619ac 128M NAND support

* ipq40xx: add p2w-r619ac 128M NAND support

* ipq40xx: add p2w-r619ac 128M NAND support

* ipq40xx: add p2w-r619ac 128M NAND support

* delete sd gpio

This reverts commit 176f1241.

This reverts commit baa682be.