MLBEDSW-10423: Fix early return on Transpose check

A recent update let NPU op tests continue past the
Transpose/Reverse operator check, allowing it to fail on
unrelated data type criteria. This prevented INT32 transposes
from being compiled. This commit inverts the check back
for an early return.

Signed-off-by: Philip Hall <philip.hall@arm.com>
Change-Id: I404b71047aa401e4f70bb754dd9ac4f676d3d792