Add VFP-accelerated version of synth_filter_float(), used by DTS Coherent Acoustics decoder
1st version of ff_int32_to_float_fmul_scalar_vfp
2nd version of fmul_scalar
Add VFP-accelerated version of imdct_half
Add VFP_accelerated version of dca_lfe_fir
Add VFP-accelerated version of fft16