MIPS: bcm963xx: Move extended flash address to bcm_tag header file

The extended flash address needs to be subtracted from bcm_tag flash
image offsets. Move this value to the bcm_tag header file.

Renamed define name to consistently use bcm963xx for flash layout
which should be considered a property of the board and not the SoC
(i.e. bcm63xx could theoretically be used on a board without CFE
or any flash).

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Jonas Gorski <jogo@openwrt.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Cc: MIPS Mailing List <linux-mips@linux-mips.org>
Cc: MTD Maling List <linux-mtd@lists.infradead.org>
Patchwork: https://patchwork.linux-mips.org/patch/11833/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

drivers/mtd/bcm63xxpart.c

@@ -37,8 +37,6 @@
 #include <asm/mach-bcm63xx/bcm63xx_nvram.h>
 #include <asm/mach-bcm63xx/board_bcm963xx.h>
 
-#define BCM63XX_EXTENDED_SIZE	0xBFC00000	/* Extended flash address */
-
 #define BCM63XX_CFE_BLOCK_SIZE	SZ_64K		/* always at least 64KiB */
 
 #define BCM63XX_CFE_MAGIC_OFFSET 0x4e0
@@ -123,8 +121,8 @@ static int bcm63xx_parse_cfe_partitions(struct mtd_info *master,
 		pr_info("CFE boot tag found with version %s and board type %s\n",
 			tagversion, boardid);
 
-		kerneladdr = kerneladdr - BCM63XX_EXTENDED_SIZE;
-		rootfsaddr = rootfsaddr - BCM63XX_EXTENDED_SIZE;
+		kerneladdr = kerneladdr - BCM963XX_EXTENDED_SIZE;
+		rootfsaddr = rootfsaddr - BCM963XX_EXTENDED_SIZE;
 		spareaddr = roundup(totallen, master->erasesize) + cfelen;
 
 		if (rootfsaddr < kerneladdr) {

include/linux/bcm963xx_tag.h

@@ -28,6 +28,11 @@
 	"DWV-S0", \
 }
 
+/* Extended flash address, needs to be subtracted
+ * from bcm_tag flash image offsets.
+ */
+#define BCM963XX_EXTENDED_SIZE	0xBFC00000
+
 /*
  * The broadcom firmware assumes the rootfs starts the image,
  * therefore uses the rootfs start (flash_image_address)