bcachefs: fix bch_folio_sector padding

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/fs-io-pagecache.h

@@ -51,13 +51,10 @@ enum bch_folio_sector_state {
 
 struct bch_folio_sector {
 	/* Uncompressed, fully allocated replicas (or on disk reservation): */
-	unsigned		nr_replicas:4;
-
+	u8			nr_replicas:4,
 	/* Owns PAGE_SECTORS * replicas_reserved sized in memory reservation: */
-	unsigned		replicas_reserved:4;
-
-	/* i_sectors: */
-	enum bch_folio_sector_state state:8;
+				replicas_reserved:4;
+	u8			state;
 };
 
 struct bch_folio {