arch/arm: drop legacy dependency for floating point strategy

arch/arm: drop legacy dependency for floating point strategy

The floating point strategy currently depends on EABI || EABIHF. The
reason was that, wayback when we also supported OABI, we only exposed FP
for EABI or EABIHF, and hide it for OABI, which did not support FP.

It's been a while now that we do not support OABI, but the dependency
stuck all along.

Remove it as it is no longer needed, and is always true.

However, the choice is empty for AArch64, as we still have no entry for
their floating point strategy yet.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>