mm: mem_reliable: Fix blank space issue in reliable_report_usage()

hulk inclusion
category: cleanup
bugzilla: https://gitee.com/openeuler/kernel/issues/I6WKXZ
CVE: NA

--------------------------------

The blank space before kB is needed to align the previous memory report
style.
Signed-off-by: NMa Wupeng <mawupeng1@huawei.com>
Reviewed-by: NKefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: NJialin Zhang <zhangjialin11@huawei.com>

mm/mem_reliable.c

@@ -529,5 +529,5 @@ void reliable_report_usage(struct seq_file *m, struct mm_struct *mm)
 		return;
 
 	SEQ_PUT_DEC("Reliable:\t", atomic_long_read(&mm->reliable_nr_page));
-	seq_puts(m, "kB\n");
+	seq_puts(m, " kB\n");
 }