PM / Hibernate: Do not initialize static and extern variables to 0

Static and extern variables in kernel/power/hibernate.c need not be
initialized to 0 explicitly, so remove those initializations.

[rjw: Modified subject, added changelog.]
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

kernel/power/hibernate.c

@@ -30,14 +30,14 @@
 #include "power.h"
 
 
-static int nocompress = 0;
-static int noresume = 0;
-static int resume_wait = 0;
-static int resume_delay = 0;
+static int nocompress;
+static int noresume;
+static int resume_wait;
+static int resume_delay;
 static char resume_file[256] = CONFIG_PM_STD_PARTITION;
 dev_t swsusp_resume_device;
 sector_t swsusp_resume_block;
-int in_suspend __nosavedata = 0;
+int in_suspend __nosavedata;
 
 enum {
 	HIBERNATION_INVALID,