ARM: shmobile: Make r8a73a4 Arch timer optional

Update the r8a73a4 code to allow using other
timers than Arch timer for clock event

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
diff --git a/arch/arm/mach-shmobile/board-ape6evm.c b/arch/arm/mach-shmobile/board-ape6evm.c
index 1fbc39a..af6dd39 100644
--- a/arch/arm/mach-shmobile/board-ape6evm.c
+++ b/arch/arm/mach-shmobile/board-ape6evm.c
@@ -101,6 +101,7 @@
 };
 
 DT_MACHINE_START(APE6EVM_DT, "ape6evm")
+	.init_early	= r8a73a4_init_delay,
 	.init_time	= shmobile_timer_init,
 	.init_machine	= ape6evm_add_standard_devices,
 	.dt_compat	= ape6evm_boards_compat_dt,