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-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index 2073f0e..f90aa27 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -986,7 +986,7 @@
 	.init_irq	= pxa27x_init_irq,
 	.handle_irq	= pxa27x_handle_irq,
 	.init_machine	= spitz_init,
-	.timer		= &pxa_timer,
+	.init_time	= pxa_timer_init,
 	.restart	= spitz_restart,
 MACHINE_END
 #endif
@@ -1000,7 +1000,7 @@
 	.init_irq	= pxa27x_init_irq,
 	.handle_irq	= pxa27x_handle_irq,
 	.init_machine	= spitz_init,
-	.timer		= &pxa_timer,
+	.init_time	= pxa_timer_init,
 	.restart	= spitz_restart,
 MACHINE_END
 #endif
@@ -1014,7 +1014,7 @@
 	.init_irq	= pxa27x_init_irq,
 	.handle_irq	= pxa27x_handle_irq,
 	.init_machine	= spitz_init,
-	.timer		= &pxa_timer,
+	.init_time	= pxa_timer_init,
 	.restart	= spitz_restart,
 MACHINE_END
 #endif