[MTD] LPDDR added new pfow_base parameter

We need to supply additional parameter to mapping driver and tell
LPDDR drivers where PFOW window is in chip mapping.
It leads to necessity of map_info structure extendoing.
Signed-off-by: Alexey Korolev <akorolev@infradead.org>
Acked-by: Jared Hulbert <jaredeh@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

include/linux/mtd/map.h

@@ -223,6 +223,7 @@ struct map_info {
 	   must leave it enabled. */
 	void (*set_vpp)(struct map_info *, int);
 
+	unsigned long pfow_base;
 	unsigned long map_priv_1;
 	unsigned long map_priv_2;
 	void *fldrv_priv;