PM: hibernate: fix the kerneldoc comment for swsusp_check() and swsusp_close()

The comments for both swsusp_check() and swsusp_close() don't actually
describe what they are doing.

Just removing the comments would probably better, but as the file is
full of useless kerneldoc comments for non-exported symbols this fits
in better with the style.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

kernel/power/swap.c

@@ -1513,7 +1513,7 @@ int swsusp_read(unsigned int *flags_p)
 static void *swsusp_holder;
 
 /**
- * swsusp_check - Check for swsusp signature in the resume device
+ * swsusp_check - Open the resume device and check for the swsusp signature.
  * @exclusive: Open the resume device exclusively.
  */
 
@@ -1564,7 +1564,7 @@ int swsusp_check(bool exclusive)
 }
 
 /**
- * swsusp_close - close swap device.
+ * swsusp_close - close resume device.
  * @exclusive: Close the resume device which is exclusively opened.
  */