Add initial device tree support for the Buffalo WXR-1750DHP, a consumer Wi-Fi router based on the Broadcom BCM4708A0 SoC. Hardware specifications: * Processor: Broadcom BCM4708A0 dual-core @ 800 MHz * RAM: DDR3 256 MB * Ethernet Switch: Broadcom BCM53011 integrated via SRAB * NAND Flash: 128 MB (8-bit ECC) * SPI Flash: None * Ports: 4 LAN Ports, 1 WAN Port * USB: 1x USB 3.0 Type-A port Signed-off-by: Taishi Shimizu <s.taishi14142@gmail.com> Link: https://lore.kernel.org/r/20250713071826.726682-3-s.taishi14142@gmail.com Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>