ARM: set arch_gettimeoffset directly

remove ARM's struct sys_timer .offset function pointer, and instead
directly set the arch_gettimeoffset function pointer when the timer
driver is initialized. This requires multiplying all function results
by 1000, since the removed arm_gettimeoffset() did this. Also,
s/unsigned long/u32/ just to make the function prototypes exactly
match that of arch_gettimeoffset.

Cc: Russell King <linux@arm.linux.org.uk>
Cc: Andrew Victor <linux@maxim.org.za>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ryan Mallon <rmallon@gmail.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

arch/arm/mach-rpc/time.c

@@ -24,7 +24,7 @@
 
 #include <asm/mach/time.h>
 
-unsigned long ioc_timer_gettimeoffset(void)
+static u32 ioc_timer_gettimeoffset(void)
 {
 	unsigned int count1, count2, status;
 	long offset;
@@ -56,7 +56,7 @@ unsigned long ioc_timer_gettimeoffset(void)
 	}
 
 	offset = (LATCH - offset) * (tick_nsec / 1000);
-	return (offset + LATCH/2) / LATCH;
+	return ((offset + LATCH/2) / LATCH) * 1000;
 }
 
 void __init ioctime_init(void)
@@ -84,12 +84,12 @@ static struct irqaction ioc_timer_irq = {
  */
 static void __init ioc_timer_init(void)
 {
+	arch_gettimeoffset = ioc_timer_gettimeoffset;
 	ioctime_init();
 	setup_irq(IRQ_TIMER0, &ioc_timer_irq);
 }
 
 struct sys_timer ioc_timer = {
 	.init		= ioc_timer_init,
-	.offset		= ioc_timer_gettimeoffset,
 };