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-pxa/raumfeld.c

@@ -1095,7 +1095,7 @@ MACHINE_START(RAUMFELD_RC, "Raumfeld Controller")
 	.nr_irqs	= PXA_NR_IRQS,
 	.init_irq	= pxa3xx_init_irq,
 	.handle_irq	= pxa3xx_handle_irq,
-	.timer		= &pxa_timer,
+	.init_time	= pxa_timer_init,
 	.restart	= pxa_restart,
 MACHINE_END
 #endif
@@ -1108,7 +1108,7 @@ MACHINE_START(RAUMFELD_CONNECTOR, "Raumfeld Connector")
 	.nr_irqs	= PXA_NR_IRQS,
 	.init_irq	= pxa3xx_init_irq,
 	.handle_irq	= pxa3xx_handle_irq,
-	.timer		= &pxa_timer,
+	.init_time	= pxa_timer_init,
 	.restart	= pxa_restart,
 MACHINE_END
 #endif
@@ -1121,7 +1121,7 @@ MACHINE_START(RAUMFELD_SPEAKER, "Raumfeld Speaker")
 	.nr_irqs	= PXA_NR_IRQS,
 	.init_irq	= pxa3xx_init_irq,
 	.handle_irq	= pxa3xx_handle_irq,
-	.timer		= &pxa_timer,
+	.init_time	= pxa_timer_init,
 	.restart	= pxa_restart,
 MACHINE_END
 #endif