Add defines for ext_csd field MAX_ENH_SIZE_MULT

Signed-off-by: Oliver Metz <oliver@freetz.org>
Reviewed-by: Ben Gardiner <ben.l.gardiner@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/mmc.h b/mmc.h
index 72baab8..9871d62 100644
--- a/mmc.h
+++ b/mmc.h
@@ -52,6 +52,9 @@
 #define EXT_CSD_BKOPS_EN		163	/* R/W */
 #define EXT_CSD_RST_N_FUNCTION		162	/* R/W */
 #define EXT_CSD_PARTITIONING_SUPPORT	160	/* RO */
+#define EXT_CSD_MAX_ENH_SIZE_MULT_2	159
+#define EXT_CSD_MAX_ENH_SIZE_MULT_1	158
+#define EXT_CSD_MAX_ENH_SIZE_MULT_0	157
 #define EXT_CSD_PARTITIONS_ATTRIBUTE	156	/* R/W */
 #define EXT_CSD_PARTITION_SETTING_COMPLETED	155	/* R/W */
 #define EXT_CSD_ENH_SIZE_MULT_2		142