arm: berlin: remove non-necessary flush_cache_all()

I believe the flush_cache_all() after scu_enable() is to "Ensure that
the data accessed by CPU0 before the SCU was initialised is visible
to the other CPUs." as commented in scu_enable(). So here
flush_cache_all() is a duplication, remove it.

Signed-off-by: Jisheng Zhang <[e-mail]>

arch/arm/mach-berlin/platsmp.c

···
 		goto unmap_scu;
 
 	scu_enable(scu_base);
-	flush_cache_all();
 
 	/*
 	 * Write the first instruction the CPU will execute after being reset