dm: spi: add BCM63xx HSSPI driver

This driver is a simplified version of linux/drivers/spi/spi-bcm63xx-hsspi.c

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index ebc71c2..28ddcf8 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -40,6 +40,14 @@
 	  many AT91 (ARM) chips. This driver can be used to access
 	  the SPI Flash, such as AT25DF321.
 
+config BCM63XX_HSSPI
+	bool "BCM63XX HSSPI driver"
+	depends on ARCH_BMIPS
+	help
+	  Enable the BCM6328 HSSPI driver. This driver can be used to
+	  access the SPI NOR flash on platforms embedding this Broadcom
+	  SPI core.
+
 config BCM63XX_SPI
 	bool "BCM6348 SPI driver"
 	depends on ARCH_BMIPS