[MTD] [NAND] pxa3xx_nand: added warning which tells id of detected NAND

Minor patch to help debugging of NAND detection.

Signed-off-by: Enrico Scholz <[e-mail]>
Signed-off-by: David Woodhouse <[e-mail]>

drivers/mtd/nand/pxa3xx_nand.c

···
 				    const struct pxa3xx_nand_platform_data *pdata)
 {
 	const struct pxa3xx_nand_flash *f;
-	uint32_t id;
+	uint32_t id = -1;
 	int i;
 
 	for (i = 0; i<pdata->num_flash; ++i) {
···
 	}
 #endif
 
+	dev_warn(&info->pdev->dev,
+		 "failed to detect configured nand flash; found %04x instead of\n",
+		 id);
 	return -ENODEV;
 }