[lldb] [test] Restrict x86-64-write register test to x86-64

Author: mgorny

lldb/test/Shell/Register/x86-64-write.test

@@ -1,6 +1,6 @@
 # XFAIL: system-darwin
 # XFAIL: system-windows
-# REQUIRES: native && (target-x86 || target-x86_64) && native-cpu-sse
+# REQUIRES: native && target-x86_64
 # RUN: %clangxx_host %p/Inputs/x86-64-write.cpp -o %t
 # RUN: %lldb -b -s %s %t | FileCheck %s
 process launch