rtc: rtc interfaces don't use class_device

This patch removes class_device from the programming interface that the RTC
framework exposes to the rest of the kernel.  Now an rtc_device is passed,
which is more type-safe and streamlines all the relevant code.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-By: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index ac0e68e..2f06b5f 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -263,7 +263,7 @@
 
 		at91_sys_write(AT91_RTC_SCCR, rtsr);	/* clear status reg */
 
-		rtc_update_irq(&rtc->class_dev, 1, events);
+		rtc_update_irq(rtc, 1, events);
 
 		pr_debug("%s(): num=%ld, events=0x%02lx\n", __FUNCTION__,
 			events >> 8, events & 0x000000FF);