target/arm: Implement FP data-processing (2 source) for fp16

target/arm: Implement FP data-processing (2 source) for fp16

We missed all of the scalar fp16 binary operations.

Cc: qemu-stable@nongnu.org
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20180512003217.9105-7-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit b8f5171cf01420a9f0ee895c5591e9b9914f391a)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>