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/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 3532c2a..f5960a7 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -66,6 +66,13 @@
 	  access the SPI NOR flash on platforms embedding these Broadcom
 	  SPI cores.
 
+config BCMSTB_SPI
+	bool "BCMSTB SPI driver"
+	help
+	  Enable the Broadcom set-top box SPI driver. This driver can
+	  be used to access the SPI flash on platforms embedding this
+	  Broadcom SPI core.
+
 config CADENCE_QSPI
 	bool "Cadence QSPI driver"
 	help