Merge branch '2023-02-07-assorted-updates'

- Default to dynamic LMB allocation, and fix an issue with the EFI one,
  assorted TI platform updates, socrates platform updates, switch
  qemu-arm to using bootstd, imagetool fixes, macOS host build fixes,
  keymile platform upates, spl FPGA load fix, MMC env bugfix, add seama
  command, usb bootdev test bugfix.