metag: don't check for cache aliasing on smp cpu boot

The cache configuration of the boot cpu is now duplicated to secondary
cpus, so there's no need to check for cache aliasing again when a
secondary cpu is booted. Therefore remove the check from
secondary_start_kernel().

Signed-off-by: James Hogan <james.hogan@imgtec.com>

arch/metag/kernel/smp.c

@@ -403,12 +403,6 @@ asmlinkage void secondary_start_kernel(void)
 	 */
 	set_cpu_online(cpu, true);
 
-	/*
-	 * Check for cache aliasing.
-	 * Preemption is disabled
-	 */
-	check_for_cache_aliasing(cpu);
-
 	/*
 	 * OK, it's off to the idle thread for us
 	 */