fix: move handoff build configuration for TF

This was erroneously placed in the TFTF build group, move it to the
right group, and while we're here ensure there is actaully a
configuration of TFTF.

Change-Id: I436e7c40ab80c0cbc1064b72d1a92ddd39341ba7
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
2 files changed