Use kleidiAI on static builds (#3806)

Summary:
X-link: facebookresearch/FBGEMM#889

Pull Request resolved: #3806

Open-source builds as static library were failing

Reviewed By: q10

Differential Revision: D71078076

fbshipit-source-id: d47321d2ea606d8d85a47f9c3697353dd9f325af

Author: Nicoshev

include/fbgemm/FbgemmPackMatrixB.h

@@ -299,7 +299,7 @@ class PackedGemmMatrixB {
   bool pmat_passed_in{false};
 };
 
-#ifndef FBGEMM_STATIC
+#ifndef _M_X64
 
 template <>
 FBGEMM_API

src/FbgemmPackMatrixB.cc

@@ -28,7 +28,7 @@ namespace fbgemm {
 // register layouts), 2 (with kernels of 1x2~6x2 register layout), or 3 (with
 // kernels of 1x3~4x3 register layout).
 
-#ifndef FBGEMM_STATIC
+#ifndef _M_X64
 
 template <>
 FBGEMM_API