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-ux500/timer.c b/arch/arm/mach-ux500/timer.c
index 46a7244..aa2a78a 100644
--- a/arch/arm/mach-ux500/timer.c
+++ b/arch/arm/mach-ux500/timer.c
@@ -46,7 +46,7 @@
 	{ },
 };
 
-static void __init ux500_timer_init(void)
+void __init ux500_timer_init(void)
 {
 	void __iomem *mtu_timer_base;
 	void __iomem *prcmu_timer_base;
@@ -99,7 +99,3 @@
 	clksrc_dbx500_prcmu_init(prcmu_timer_base);
 	ux500_twd_init();
 }
-
-struct sys_timer ux500_timer = {
-	.init		= ux500_timer_init,
-};