board: arm: Add support for Broadcom BCM7445

Add support for loading U-Boot on the Broadcom 7445 SoC.  This port
assumes Broadcom's BOLT bootloader is acting as the second stage
bootloader, and U-Boot is acting as the third stage bootloader, loaded
as an ELF program by BOLT.

Signed-off-by: Thomas Fitzsimmons <fitzsim@fitzsim.org>
Cc: Stefan Roese <sr@denx.de>
Cc: Tom Rini <trini@konsulko.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 3321055..58d5b72 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -49,6 +49,10 @@
 #define SPL_BUILD	0
 #endif
 
+#if CONFIG_IS_ENABLED(OF_PRIOR_STAGE)
+extern phys_addr_t prior_stage_fdt_address;
+#endif
+
 /*
  * Information about a resource. start is the first address of the resource
  * and end is the last address (inclusive). The length of the resource will