target/arm: Add BFMLA, BFMLS (vectors)

FEAT_SVE_B16B16 adds bfloat16 versions of the FMLA and FMLS insns in
the "SVE floating-point multiply-accumulate writing addend" group,
encoded as sz=0b00.

Fixes: 7b1613a1020d2942 ("target/arm: Enable FEAT_SME2p1 on -cpu max")
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20250718173032.2498900-6-peter.maydell@linaro.org
3 files changed