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-imx/mach-pca100.c

@@ -416,10 +416,6 @@ static void __init pca100_timer_init(void)
 	mx27_clocks_init(26000000);
 }
 
-static struct sys_timer pca100_timer = {
-	.init = pca100_timer_init,
-};
-
 MACHINE_START(PCA100, "phyCARD-i.MX27")
 	.atag_offset = 0x100,
 	.map_io = mx27_map_io,
@@ -427,6 +423,6 @@ MACHINE_START(PCA100, "phyCARD-i.MX27")
 	.init_irq = mx27_init_irq,
 	.handle_irq = imx27_handle_irq,
 	.init_machine = pca100_init,
-	.timer = &pca100_timer,
+	.init_time	= pca100_timer_init,
 	.restart	= mxc_restart,
 MACHINE_END