mtd: ixp4xx: fix reading from half-word boundary

Fix handling of reads that don't start on a half-word boundary.
Signed-off-by: NJon Ringle <jon@ringle.org>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/maps/ixp4xx.c

@@ -107,7 +107,7 @@ static void ixp4xx_copy_from(struct map_info *map, void *to,
 		return;
 
 	if (from & 1) {
-		*dest++ = BYTE1(flash_read16(src));
+		*dest++ = BYTE1(flash_read16(src-1));
 		src++;
 		--len;
 	}