arm64: dts: add description for solidrun cn9132 cex7 module and clearfog board

Add description for the SolidRun CN9132 COM-Express Type 7 module, and
the Clearfog evaluation board.

The COM-Express module includes:
- CN9130 SoC
- 2x 88F8215 Southbridges
- eMMC
- SPI Flash
- DDR-4 SODIMM connector
- 1GBase-T Ethernet PHY

The Clearfog Evaluation board provides:
- 1x 10Gbps SFP+
- 2x 5GBase-T RJ45
- 4x 1GBase-T RJ45 on DSA switch with 2.5Gbps cpu link
- 1x full-size PCI-E x4
- 2x M.2 with PCI-E x1
- 1x M.2 with PCI-E x2
- 2x M.2 with PCI-E x1 and USB-2.0
- 1x M.2 with USB-2.0, USB-3.0 and 2x SIM slots
- 1x mini-PCI-E x1
- 2x SATA (Laptop-Style connector with data and power)
- 3x USB-3.0 Type-A
- microSD slot

Signed-off-by: Josua Mayer <josua@solid-run.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>