compiler-rt: Fix the leoncasa CPU feature check for sparc32.

lib/compiler_rt/atomics.zig

@@ -30,7 +30,7 @@ const largest_atomic_size = switch (arch) {
     // On SPARC systems that lacks CAS and/or swap instructions, the only
     // available atomic operation is a test-and-set (`ldstub`), so we force
     // every atomic memory access to go through the lock.
-    .sparc => if (cpu.features.featureSetHas(.hasleoncasa)) @sizeOf(usize) else 0,
+    .sparc => if (std.Target.sparc.featureSetHas(builtin.cpu.features, .hasleoncasa)) @sizeOf(usize) else 0,
 
     // XXX: On x86/x86_64 we could check the presence of cmpxchg8b/cmpxchg16b
     // and set this parameter accordingly.