XNNPACK is not supported on PowerPC so disable it by default.
See https://github.com/tensorflow/tensorflow/issues/58768

Author: Alexander Grund (TU Dresden)

diff --git a/tensorflow/lite/BUILD b/tensorflow/lite/BUILD
index 198f949b341..d15dcf9a80d 100644
--- a/tensorflow/lite/BUILD
+++ b/tensorflow/lite/BUILD
@@ -709,6 +709,8 @@ cc_library(
     deps = select({
         "//tensorflow:macos": [],
         "//tensorflow:fuchsia": [],
+        # XNNPACK is not supported on PPC
+        "//tensorflow:linux_ppc64le": [],
         "//conditions:default": [":tflite_with_xnnpack_enabled"],
     }),
 )