ARM: S3C64XX: Fix missing header error with CONFIG_CPU_IDLE enabled

Recently the regs-syscon-power.h header was moved from
mach-s3c64xx/include/mach to mach-s3c64xx/, but cpuidle.c was not
updated to include the header from its new location, which caused
build error with CONFIG_CPU_IDLE enabled.

This patch fixed the problem by updating the include line with
proper header location.
Signed-off-by: NTomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-s3c64xx/cpuidle.c

@@ -20,9 +20,8 @@
 
 #include <mach/map.h>
 
-#include <mach/regs-syscon-power.h>
-
 #include "regs-sys.h"
+#include "regs-syscon-power.h"
 
 static int s3c64xx_enter_idle(struct cpuidle_device *dev,
 			      struct cpuidle_driver *drv,