bcm63xx: Simplify CFE detection.

Check bootloader argument in mtd.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
[jogo@openwrt.org: split into two patches, one for detection,
                   one letting bcm63xxpart use it.]
Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 36659

target/linux/brcm63xx/patches-3.8/309-cfe_version_mod.patch

@@ -9,18 +9,3 @@
  	else
  		strcpy(cfe_version, "unknown");
  	printk(KERN_INFO PFX "CFE version: %s\n", cfe_version);
---- a/drivers/mtd/bcm63xxpart.c
-+++ b/drivers/mtd/bcm63xxpart.c
-@@ -56,10 +56,10 @@ static int bcm63xx_detect_cfe(struct mtd
- 	if (ret)
- 		return ret;
- 
--	if (strncmp("cfe-v", buf, 5) == 0)
-+	if (strncmp("cfe-", buf, 4) == 0)
- 		return 0;
- 
--	/* very old CFE's do not have the cfe-v string, so check for magic */
-+	/* very old CFE's do not have the cfe- string, so check for magic */
- 	ret = mtd_read(master, BCM63XX_CFE_MAGIC_OFFSET, 8, &retlen,
- 		       (void *)buf);
- 	buf[retlen] = 0;