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-mv78xx0/common.c b/arch/arm/mach-mv78xx0/common.c
index d0cb485..0efa144 100644
--- a/arch/arm/mach-mv78xx0/common.c
+++ b/arch/arm/mach-mv78xx0/common.c
@@ -336,16 +336,12 @@
 	orion_time_set_base(TIMER_VIRT_BASE);
 }
 
-static void __init_refok mv78xx0_timer_init(void)
+void __init_refok mv78xx0_timer_init(void)
 {
 	orion_time_init(BRIDGE_VIRT_BASE, BRIDGE_INT_TIMER1_CLR,
 			IRQ_MV78XX0_TIMER_1, get_tclk());
 }
 
-struct sys_timer mv78xx0_timer = {
-	.init = mv78xx0_timer_init,
-};
-
 
 /*****************************************************************************
  * General