imx8qm-mek: Rename, update to B0, add PCI, OP-TEE, Broadcom WiFi, and device trees

imx8qm-mek: Rename, update to B0, add PCI, OP-TEE, Broadcom WiFi, and device trees

Rename to match device tree name and improve readability.

Update to B0, which requires boot seek of 32.

Fix missing pci support.

Add OP-TEE support. Add optee to MACHINE_FEATURES to enable OP-TEE
in u-boot-imx. OP-TEE is currently not supported by u-boot-fslc.

Enable Broadcom 4356, 4359, and 43455 WiFi modules.

Add device trees for PCIE EP, lvds, Sound Open Firmware, and USD WiFi.

Signed-off-by: Tom Hochstein <tom.hochstein@nxp.com>