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-imx6q.c

@@ -241,10 +241,6 @@ static void __init imx6q_timer_init(void)
 	imx_print_silicon_rev("i.MX6Q", imx6q_revision());
 }
 
-static struct sys_timer imx6q_timer = {
-	.init = imx6q_timer_init,
-};
-
 static const char *imx6q_dt_compat[] __initdata = {
 	"fsl,imx6q",
 	NULL,
@@ -255,7 +251,7 @@ DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad (Device Tree)")
 	.map_io		= imx6q_map_io,
 	.init_irq	= imx6q_init_irq,
 	.handle_irq	= imx6q_handle_irq,
-	.timer		= &imx6q_timer,
+	.init_time	= imx6q_timer_init,
 	.init_machine	= imx6q_init_machine,
 	.init_late      = imx6q_init_late,
 	.dt_compat	= imx6q_dt_compat,