ARM: highbank: remove the .map_io declaration

Now that the ARM core code calls debug_ll_io_init, we can remove it from
the machine_desc declaration.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-highbank/highbank.c

@@ -176,7 +176,6 @@ static const char *highbank_match[] __initconst = {
 
 DT_MACHINE_START(HIGHBANK, "Highbank")
 	.smp		= smp_ops(highbank_smp_ops),
-	.map_io		= debug_ll_io_init,
 	.init_irq	= highbank_init_irq,
 	.init_time	= highbank_timer_init,
 	.init_machine	= highbank_init,