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>

arch/arm/mach-dove/common.c

@@ -242,17 +242,13 @@ static int __init dove_find_tclk(void)
 	return 166666667;
 }
 
-static void __init dove_timer_init(void)
+void __init dove_timer_init(void)
 {
 	dove_tclk = dove_find_tclk();
 	orion_time_init(BRIDGE_VIRT_BASE, BRIDGE_INT_TIMER1_CLR,
 			IRQ_DOVE_BRIDGE, dove_tclk);
 }
 
-struct sys_timer dove_timer = {
-	.init = dove_timer_init,
-};
-
 /*****************************************************************************
  * Cryptographic Engines and Security Accelerator (CESA)
  ****************************************************************************/
@@ -454,7 +450,7 @@ DT_MACHINE_START(DOVE_DT, "Marvell Dove (Flattened Device Tree)")
 	.map_io		= dove_map_io,
 	.init_early	= dove_init_early,
 	.init_irq	= orion_dt_init_irq,
-	.timer		= &dove_timer,
+	.init_time	= dove_timer_init,
 	.init_machine	= dove_dt_init,
 	.restart	= dove_restart,
 	.dt_compat	= dove_dt_board_compat,