[MIPS] Oprofile: Fix MIPSxx counter number detection.

Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/oprofile/op_model_mipsxx.c

@@ -220,7 +220,7 @@ static inline int n_counters(void)
 {
 	int counters = __n_counters();
 
-#ifndef CONFIG_SMP
+#ifdef CONFIG_MIPS_MT_SMP
 	if (current_cpu_data.cputype == CPU_34K)
 		return counters >> 1;
 #endif