redhat-rpm-config: keep armv5tel default on non-hardfp v7, disable Thumb2
We have decided to disable Thumb2 and this should have been pushed before.
Since Thumb2/ARM are compatible at the call-site level due to interworking,
we can just drop in replace existing builds with Thumb2 disabled later.
Signed-off-by: Jon Masters <email@example.com>