[Linaro-uefi] PE/COFF machine type for ARM V7 binaries

I'm trying to nail down what the proper Machine Type value in the PE/COFF header should be for ARM linux images with the stub.

The PE/COFF specification lists two values that seem appropriate:

IMAGE_FILE_MACHINE_ARM 0x1c0 "ARM little endian" IMAGE_FILE_MACHINE_THUMB 0x1c2 "ARM or Thumb ("interworking")"

Tianocore currently only supports the 0x1c2 value, but it seems that the 0x1c0 should also be supported. Is there a specific reason only 0x1c2 is supported?

Thanks, Roy