Split FP16 SME kernels into seperate assembly file.
Move the assembly blocks of the following kernels into their own files:
- lhs_pack_x16p2vlx2_x16_sme
- rhs_pack_kxn_x16p2vlx2b_x16_x16_sme
- matmul_clamp_f16_f16p2vlx2_f16p2vlx2_2vlx2vl_sme2_mopa
- matmul_clamp_f16_f16_f16p2vlx2b_1x16vl_sme2_dot
Signed-off-by: Jens Elofsson jens.elofsson@arm.com