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-shmobile/setup-r8a7779.c b/arch/arm/mach-shmobile/setup-r8a7779.c
index 7a1ad4f..a181ced 100644
--- a/arch/arm/mach-shmobile/setup-r8a7779.c
+++ b/arch/arm/mach-shmobile/setup-r8a7779.c
@@ -339,7 +339,7 @@
 /* do nothing for !CONFIG_SMP or !CONFIG_HAVE_TWD */
 void __init __weak r8a7779_register_twd(void) { }
 
-static void __init r8a7779_earlytimer_init(void)
+void __init r8a7779_earlytimer_init(void)
 {
 	r8a7779_clock_init();
 	shmobile_earlytimer_init();
@@ -366,7 +366,4 @@
 	 * As a final step pass earlyprint=sh-sci.2,115200 on the kernel
 	 * command line in case of the marzen board.
 	 */
-
-	/* override timer setup with soc-specific code */
-	shmobile_timer.init = r8a7779_earlytimer_init;
 }