mtd: spi-nor: Fix S3AN addressing calculation

The page calculation under spi_nor_s3an_addr_convert() was wrong. On
Default Address Mode we need to perform a divide by page_size.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>

drivers/mtd/spi-nor/spi-nor.c

@@ -431,11 +431,14 @@ static void spi_nor_unlock_and_unprep(struct spi_nor *nor, enum spi_nor_ops ops)
  */
 static loff_t spi_nor_s3an_addr_convert(struct spi_nor *nor, unsigned int addr)
 {
-	unsigned int offset = addr;
+	unsigned int offset;
+	unsigned int page;
 
-	offset %= nor->page_size;
+	offset = addr % nor->page_size;
+	page = addr / nor->page_size;
+	page <<= (nor->page_size > 512) ? 10 : 9;
 
-	return ((addr - offset) << 1) | offset;
+	return page | offset;
 }
 
 /*