[IA64] Wrong args to memset in efi_gettimeofday()

Not sizeof(ptr) ... we meant to say sizeof(*ptr).

Also moved the memset to the error path (the normal path overwrites
every field in the structure anyway) -Tony

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/efi.c

@@ -218,9 +218,10 @@ efi_gettimeofday (struct timespec *ts)
 {
 	efi_time_t tm;
 
-	memset(ts, 0, sizeof(ts));
-	if ((*efi.get_time)(&tm, NULL) != EFI_SUCCESS)
+	if ((*efi.get_time)(&tm, NULL) != EFI_SUCCESS) {
+		memset(ts, 0, sizeof(*ts));
 		return;
+	}
 
 	ts->tv_sec = mktime(tm.year, tm.month, tm.day, tm.hour, tm.minute, tm.second);
 	ts->tv_nsec = tm.nanosecond;