Use fbgemm_fml_flags and add fbgemm_sve guard (#4948)

Summary:
X-link: facebookresearch/FBGEMM#1977

Add a missing part in #4942 .
I also fix another aarch64 issue on PyTorch CI:
```
/var/lib/jenkins/workspace/third_party/fbgemm/include/fbgemm/./Utils.h:26:10: fatal error: arm_neon_sve_bridge.h: No such file or directory
   26 | #include <arm_neon_sve_bridge.h> // manual
      |          ^~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
```
[ARM documentation](https://developer.arm.com/documentation/110065/0100/Software-codec-optimization/Compiler-recommendations) says:

SVE and SVE2 feature paths in libaom, libvpx, and x265 require the intrinsics declared in arm_neon_sve_bridge.h. This header file is available in the following releases:

Clang 17 and later.
GCC 14 and later.

Pull Request resolved: #4948

Reviewed By: cthi

Differential Revision: D83578552

Pulled By: q10

fbshipit-source-id: 13b07cbb68ec7b233488a1958d86510b8828a52f

Author: cyyever

CMakeLists.txt

@@ -317,7 +317,7 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|ARM64|arm64")
       -ftree-vectorize
       -fno-trapping-math
       -Wignored-qualifiers
-      -march=armv8.2-a+fp16fml
+      ${fbgemm_fml_flags}
     DEFINITIONS
       ${fbgemm_arm_defs}
     DEPS
@@ -337,7 +337,14 @@ endif()
 ################################################################################
 
 set(FBGEMM_BUILD_SVE False)
-if(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|ARM64")
+# SVE and SVE2 feature paths require the intrinsics declared in arm_neon_sve_bridge.h
+# This header file is available in the following releases:
+#    Clang 17 and later.
+#    GCC 14 and later.
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|ARM64" AND
+  ((CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 14)
+  OR (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 17)))
+
   check_cxx_compiler_flag(-march=armv8-a+sve COMPILER_SUPPORTS_SVE)
   check_cxx_compiler_flag(-march=armv8-a+sve2 COMPILER_SUPPORTS_SVE2)
   if(COMPILER_SUPPORTS_SVE2)