f2fs: add missing CONFIG_F2FS_FS_COMPRESSION

Compression sysfs node should not be shown if f2fs module disables
compression feature.

Signed-off-by: Chao Yu <[e-mail]>
Signed-off-by: Jaegeuk Kim <[e-mail]>

fs/f2fs/sysfs.c

···
 #endif
 F2FS_FEATURE_RO_ATTR(sb_checksum, FEAT_SB_CHECKSUM);
 F2FS_FEATURE_RO_ATTR(casefold, FEAT_CASEFOLD);
+#ifdef CONFIG_F2FS_FS_COMPRESSION
 F2FS_FEATURE_RO_ATTR(compression, FEAT_COMPRESSION);
+#endif
 
 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 static struct attribute *f2fs_attrs[] = {
···
 #endif
 	ATTR_LIST(sb_checksum),
 	ATTR_LIST(casefold),
+#ifdef CONFIG_F2FS_FS_COMPRESSION
 	ATTR_LIST(compression),
+#endif
 	NULL,
 };
 ATTRIBUTE_GROUPS(f2fs_feat);