Add a board dts for the Jaguar SBC from Theobroma-Systems

JAGUAR is a Single-Board Computer (SBC) based around the rk3588 SoC and
is targeting Autonomous Mobile Robots (AMR).

It features:
 * LPDDR4X (up to 16GB)
 * 1Gbps Ethernet on RJ45 connector (KSZ9031 or KSZ9131)
 * PCIe 3.0 4-lane on M.2 M-key connector
 * PCIe 2.1 1-lane on M.2 E-key
 * USB 2.0 on M.2 E-key
 * 2x USB3 OTG type-c ports with DP Alt-Mode
 * USB2 host port
 * HDMI output
 * 2x camera connectors, each exposing:
   * 2-lane MIPI-CSI
   * 1v2, 1v8, 2v8 power rails
   * I2C bus
   * GPIOs
 * PPS input
 * CAN
 * RS485 UART
 * FAN connector
 * SD card slot
 * eMMC (up to 256GB)
 * RTC backup battery
 * Companion microcontroller
   * ISL1208 RTC emulation
   * AMC6821 PWM emulation
   * On/off buzzer control
 * Secure Element
 * 80-pin Mezzanine connector for daughterboards:
   * GPIOs
   * 1Gbps Ethernet
   * PCIe 2.1 1-lane
   * 2x 2-lane MIPI-CSI
   * ADC channel
   * I2C bus
   * PWM
   * UART
   * SPI
   * SDIO
   * CAN
   * I2S
   * 1v8, 3v3, 5v0, dc-in (12-24V) power rails
Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Link: https://lore.kernel.org/r/20231201191103.343097-3-heiko@sntech.de