ARM: SAMSUNG: Let s3c_pm_do_restore_*() take const sleep_save

The restore functions do not modify the passed in struct sleep_save,
so that parameter can be const.

This allows us to pass in const struct.  This allows us to use const
structs sleep_save to define system registers that will always be
restored to a constant value.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/plat-samsung/include/plat/pm.h

@@ -101,8 +101,8 @@ struct pm_uart_save {
 /* helper functions to save/restore lists of registers. */
 
 extern void s3c_pm_do_save(struct sleep_save *ptr, int count);
-extern void s3c_pm_do_restore(struct sleep_save *ptr, int count);
-extern void s3c_pm_do_restore_core(struct sleep_save *ptr, int count);
+extern void s3c_pm_do_restore(const struct sleep_save *ptr, int count);
+extern void s3c_pm_do_restore_core(const struct sleep_save *ptr, int count);
 
 #ifdef CONFIG_SAMSUNG_PM
 extern int s3c_irq_wake(struct irq_data *data, unsigned int state);

arch/arm/plat-samsung/pm.c

@@ -182,7 +182,7 @@ void s3c_pm_do_save(struct sleep_save *ptr, int count)
  * restore the UARTs state yet
 */
 
-void s3c_pm_do_restore(struct sleep_save *ptr, int count)
+void s3c_pm_do_restore(const struct sleep_save *ptr, int count)
 {
 	for (; count > 0; count--, ptr++) {
 		printk(KERN_DEBUG "restore %p (restore %08lx, was %08x)\n",
@@ -203,7 +203,7 @@ void s3c_pm_do_restore(struct sleep_save *ptr, int count)
  * peripherals, as things may be changing!
 */
 
-void s3c_pm_do_restore_core(struct sleep_save *ptr, int count)
+void s3c_pm_do_restore_core(const struct sleep_save *ptr, int count)
 {
 	for (; count > 0; count--, ptr++)
 		__raw_writel(ptr->val, ptr->reg);