How can I set the right CMake flag for Arm CPU optimized mulmat kernels

[FranzKafkaYu]

I noticed that we can set appropriate compiler cpu-type flags for enable Arm CPU optimized mulmat kernels,and this is my CPU(Qualcomm Snapdragon Gen2):

Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 asimdfhm dit uscat ilrcpc flagm ssbs sb paca pacg dcpodp flagm2 frint i8mm bf16 bti  

how can I set the right CMake flags here?