ipq40xx: add support for Wallystech DR40x9

ipq40xx: add support for Wallystech DR40x9

Adds support for the Wallys DR40x9 series boards.
They come in IPQ4019 and IPQ4029 versions.
IPQ4019/4029 only differ in that that IPQ4029 is the industrial version that is rated to higher temperatures.

Specifications are:
* CPU: Qualcomm IPQ40x9 (4x ARMv7A Cortex A7) at 716 MHz
* RAM: 512 MB
* Storage: 2MB of SPI-NOR, 128 MB of parallel NAND
* USB 3.0 TypeA port for users
* MiniPCI-E with PCI-E 2.0 link
* MiniPCI-E for LTE modems with only USB2.0 link
* 2 SIM card slots that are selected via GPIO11
* MicroSD card slot
* Ethernet: 2x GBe with 24~48V passive POE
* SFP port (Does not work, I2C and GPIO's not connected on hardware)
* DC Jack
* UART header
* WLAN: In-SoC 2x2 802.11b/g/n and 2x2 802.11a/n/ac
* 4x MMCX connectors for WLAN
* Reset button
* 8x LED-s

Installation instructions:
Connect to UART, pins are like this:
-> 3.3V | TX | RX | GND

Settings are 115200 8n1

Boot initramfs from TFTP:
tftpboot 0x84000000 openwrt-ipq40xx-generic-wallys_dr40x9-initramfs-fit-uImage.itb

bootm

Then copy the sysupgrade image to the /tmp folder and execute sysupgrade -n <image_name>

The board file binary was provided from Wallystech on March 14th 2023
including full permission to use and distribute.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Signed-off-by: Koen Vandeputte <koen.vandeputte@citymesh.com>