ARM: delete struct sys_timer

Now that the only field in struct sys_timer is .init, delete the struct,
and replace the machine descriptor .timer field with the initialization
function itself.

This will enable moving timer drivers into drivers/clocksource without
having to place a public prototype of each struct sys_timer object into
include/linux; the intent is to create a single of_clocksource_init()
function that determines which timer driver to initialize by scanning
the device dtree, much like the proposed irqchip_init() at:
http://www.spinics.net/lists/arm-kernel/msg203686.html

Includes mach-omap2 fixes from Igor Grinberg.

Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
diff --git a/arch/arm/mach-rpc/riscpc.c b/arch/arm/mach-rpc/riscpc.c
index f3fa259c..a302cf5 100644
--- a/arch/arm/mach-rpc/riscpc.c
+++ b/arch/arm/mach-rpc/riscpc.c
@@ -211,7 +211,7 @@
 	soft_restart(0);
 }
 
-extern struct sys_timer ioc_timer;
+void ioc_timer_init(void);
 
 MACHINE_START(RISCPC, "Acorn-RiscPC")
 	/* Maintainer: Russell King */
@@ -220,6 +220,6 @@
 	.reserve_lp1	= 1,
 	.map_io		= rpc_map_io,
 	.init_irq	= rpc_init_irq,
-	.timer		= &ioc_timer,
+	.init_time	= ioc_timer_init,
 	.restart	= rpc_restart,
 MACHINE_END