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-bcm/board_bcm.c

@@ -31,10 +31,6 @@ static void timer_init(void)
 {
 }
 
-static struct sys_timer timer = {
-	.init = timer_init,
-};
-
 static void __init init_irq(void)
 {
 	of_irq_init(irq_match);
@@ -50,7 +46,7 @@ static const char * const bcm11351_dt_compat[] = { "bcm,bcm11351", NULL, };
 
 DT_MACHINE_START(BCM11351_DT, "Broadcom Application Processor")
 	.init_irq = init_irq,
-	.timer = &timer,
+	.init_time = timer_init,
 	.init_machine = board_init,
 	.dt_compat = bcm11351_dt_compat,
 	.handle_irq = gic_handle_irq,