f2fs: push some variables to debug part

Some, counters are needed only for the statistical information
while debugging.
So, those can be controlled using CONFIG_F2FS_STAT_FS,
pushing the usage for few variables under this flag.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 3a0d027..be668ff 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -610,7 +610,10 @@
 	else
 		new_curseg(sbi, type, false);
 out:
+#ifdef CONFIG_F2FS_STAT_FS
 	sbi->segment_count[curseg->alloc_type]++;
+#endif
+	return;
 }
 
 void allocate_new_segments(struct f2fs_sb_info *sbi)
@@ -846,7 +849,9 @@
 
 	mutex_lock(&sit_i->sentry_lock);
 	__refresh_next_blkoff(sbi, curseg);
+#ifdef CONFIG_F2FS_STAT_FS
 	sbi->block_count[curseg->alloc_type]++;
+#endif
 
 	/*
 	 * SIT information should be updated before segment allocation,