[lldb][test][AArch64] Regex match field values in register test

As these are flags they can be set or not depending on what the system
libraries did prior to loading the program.

Author: DavidSpickett

lldb/test/API/commands/register/register/register_command/TestRegisters.py

@@ -628,11 +628,16 @@ def test_register_read_fields(self):
         self.common_setup()
 
         # N/Z/C/V bits will always be present, so check only for those.
-        self.expect("register read cpsr", substrs=["= (N = 0, Z = 1, C = 1, V = 0"])
-        self.expect("register read fpsr", substrs=["= (QC = 0, IDC = 0, IXC = 0"])
-        # AHP/DN/FZ/RMode always present, others may vary.
         self.expect(
-            "register read fpcr", substrs=["= (AHP = 0, DN = 0, FZ = 0, RMode = RN"]
+            "register read cpsr",
+            patterns=["= \(N = [0|1], Z = [0|1], C = [0|1], V = [0|1]"],
+        )
+        self.expect(
+            "register read fpsr", patterns=["= \(QC = [0|1], IDC = [0|1], IXC = [0|1]"]
+        )
+        # AHP/DN/FZ always present, others may vary.
+        self.expect(
+            "register read fpcr", patterns=["= \(AHP = [0|1], DN = [0|1], FZ = [0|1]"]
         )
 
         # Should get enumerator descriptions for RMode.