MIPS: kernel: smp-cmp: MIPS MT code needs CONFIG_MIPS_MT

The mips_mt_* symbols are only built and exported if
CONFIG_MIPS_MT is enabled.

Fixes the following build problem when CONFIG_SMP is enabled
but CONFIG_MIPS_MT is not.

arch/mips/built-in.o: In function `cmp_prepare_cpus':
arch/mips/kernel/smp-cmp.c:197:
undefined reference to `mips_mt_set_cpuoptions'
Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5860/

arch/mips/kernel/smp-cmp.c

@@ -199,11 +199,14 @@ void __init cmp_prepare_cpus(unsigned int max_cpus)
 	pr_debug("SMPCMP: CPU%d: %s max_cpus=%d\n",
 		 smp_processor_id(), __func__, max_cpus);
 
+#ifdef CONFIG_MIPS_MT
 	/*
 	 * FIXME: some of these options are per-system, some per-core and
 	 * some per-cpu
 	 */
 	mips_mt_set_cpuoptions();
+#endif
+
 }
 
 struct plat_smp_ops cmp_smp_ops = {