ARM: shmobile: kzm9g: Remove warning about SMP

Remove warning about SMP not working with the
clock initialisation used for kzm9g reference.

This is resolved by not selecting CONFIG_PREEMPT.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/board-kzm9g-reference.c

@@ -103,13 +103,6 @@ static const char *kzm9g_boards_compat_dt[] __initdata = {
 	NULL,
 };
 
-/* Please note that the clock initialisation shcheme used in
- * sh73a0_add_early_devices_dt() and sh73a0_add_standard_devices_dt()
- * does not work with SMP as there is a yet to be resolved lock-up in
- * workqueue initialisation.
- *
- * CONFIG_SMP should be disabled when using this code.
- */
 DT_MACHINE_START(KZM9G_DT, "kzm9g-reference")
 	.smp		= smp_ops(sh73a0_smp_ops),
 	.map_io		= sh73a0_map_io,