MIPS: c-octeon: Provide alternative SMP cache flush function

Currently c-octeon relies on octeon's own smp function to flush
I-Cache. However this function is not available on generic platform.

Just use smp_call_function_many on generic platform.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/mm/c-octeon.c

@@ -83,8 +83,13 @@ static void octeon_flush_icache_all_cores(struct vm_area_struct *vma)
 	else
 		mask = *cpu_online_mask;
 	cpumask_clear_cpu(cpu, &mask);
+#ifdef CONFIG_CAVIUM_OCTEON_SOC
 	for_each_cpu(cpu, &mask)
 		octeon_send_ipi_single(cpu, SMP_ICACHE_FLUSH);
+#else
+	smp_call_function_many(&mask, (smp_call_func_t)octeon_local_flush_icache,
+			       NULL, 1);
+#endif
 
 	preempt_enable();
 #endif