Do not add --host_copt=-march=native on Power PC. (#17161)

diff --git a/configure.py b/configure.py
index 2f268ee..60f144f 100644
--- a/configure.py
+++ b/configure.py
@@ -502,7 +502,8 @@
   for opt in cc_opt_flags.split():
     write_to_bazelrc('build:opt --copt=%s' % opt)
   # It should be safe on the same build host.
-  write_to_bazelrc('build:opt --host_copt=-march=native')
+  if not is_ppc64le():
+    write_to_bazelrc('build:opt --host_copt=-march=native')
   write_to_bazelrc('build:opt --define with_default_optimizations=true')
   # TODO(mikecase): Remove these default defines once we are able to get
   # TF Lite targets building without them.