upgrade centec arm64 sai to v1.9.1 and fix syncd compile error:
```
2021-11-21T19:58:09.0294367Z /usr/bin/ld: libSyncd.a(libSyncd_a-VendorSai.o): in function `syncd::VendorSai::queryStatsCapability(unsigned long, _sai_object_type_t, _sai_stat_capability_list_t*)':
2021-11-21T19:58:09.0297367Z ./syncd/VendorSai.cpp:439: undefined reference to `sai_query_stats_capability'
2021-11-21T19:58:09.0298900Z collect2: error: ld returned 1 exit status
```
Co-authored-by: shil <shil@centecnetworks.com>