fp32 IGEMM 4x8 and 6x8 ld64 microkernels

PiperOrigin-RevId: 378945611
diff --git a/BUILD.bazel b/BUILD.bazel
index 21174e7..46e0b84 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -4119,6 +4119,8 @@
     "src/f32-igemm/gen/5x8-minmax-aarch64-neonfma-cortex-a75.S",
     "src/f32-igemm/gen/6x8-minmax-aarch64-neonfma-cortex-a57.S",
     "src/f32-igemm/gen/6x8-minmax-aarch64-neonfma-cortex-a75.S",
+    "src/f32-igemm/gen/4x8-minmax-aarch64-neonfma-ld64.S",
+    "src/f32-igemm/gen/6x8-minmax-aarch64-neonfma-ld64.S",
     "src/qs8-gemm/gen/1x8c8-minmax-gemmlowp-aarch64-neon-mlal-padal-cortex-a53.S",
     "src/qs8-gemm/gen/1x8c8-minmax-gemmlowp-aarch64-neon-mlal-padal-prfm-cortex-a53.S",
     "src/qs8-gemm/gen/1x8c8-minmax-gemmlowp-aarch64-neon-mlal-padal-prfm.S",