Adjust ARM64_ATOMICS_FEATURE_FLAG_BIT to match the new bit position

Author: tannergooding

src/coreclr/nativeaot/Runtime/AsmOffsets.h

@@ -37,8 +37,8 @@ ASM_CONST(3FFFFFDF,3FFFFFDF,MAX_STRING_LENGTH)
 
 #if defined(HOST_ARM64)
 // Bit position for the ARM64IntrinsicConstants_Atomics flags, to be used with tbz / tbnz instructions
-// ARM64IntrinsicConstants_Atomics = 0x0080
-ASM_CONST(     7,     7, ARM64_ATOMICS_FEATURE_FLAG_BIT)
+// ARM64IntrinsicConstants_Atomics = 0x0040
+ASM_CONST(     6,     6, ARM64_ATOMICS_FEATURE_FLAG_BIT)
 #endif
 
 ASM_OFFSET(    0,     0, MethodTable, m_usComponentSize)

src/native/minipal/cpufeatures.h

@@ -56,7 +56,7 @@ enum ARM64IntrinsicConstants
 #include <assert.h>
 
 // Bit position for the ARM64IntrinsicConstants_Atomics flags, to be used with tbz / tbnz instructions
-#define ARM64_ATOMICS_FEATURE_FLAG_BIT 7
+#define ARM64_ATOMICS_FEATURE_FLAG_BIT 6
 static_assert((1 << ARM64_ATOMICS_FEATURE_FLAG_BIT) == ARM64IntrinsicConstants_Atomics, "ARM64_ATOMICS_FEATURE_FLAG_BIT must match with ARM64IntrinsicConstants_Atomics");
 
 #endif // HOST_ARM64