PM: pm_clock.h needs to include linux/notifier.h

This patch fixes below build error:

CC drivers/base/power/clock_ops.o
In file included from drivers/base/power/clock_ops.c:13:
include/linux/pm_clock.h:15: error: field 'nb' has incomplete type drivers/base/power/clock_ops.c: In function 'pm_clk_notify':
drivers/base/power/clock_ops.c:437: warning: type defaults to 'int' in declaration of '__mptr' drivers/base/power/clock_ops.c:437: warning: initialization from incompatible pointer type make[3]: *** [drivers/base/power/clock_ops.o] Error 1
make[2]: *** [drivers/base/power] Error 2
make[1]: *** [drivers/base] Error 2
make: *** [drivers] Error 2

Signed-off-by Axel Lin <[email protected]>

---
This patch is against linux-next next-20110818.
Axel

 include/linux/pm_clock.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

include/linux/pm_clock.h +1 -0

index f888013..8348866 100644
@@ -10,6 +10,7 @@
 #define _LINUX_PM_CLOCK_H
 
 #include <linux/device.h>
+#include <linux/notifier.h>
 
 struct pm_clk_notifier_block {
 	struct notifier_block nb;