board: bcm96846: Switch to using OF_UPSTREAM

This board clearly develops first in Linux which had more
hardware listed, so let's start to use OF_UPSTREAM.
This makes the NAND driver work.

Suggested-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/arch/arm/mach-bcmbca/bcm6846/Kconfig b/arch/arm/mach-bcmbca/bcm6846/Kconfig
index 5ef9535..1f5639f 100644
--- a/arch/arm/mach-bcmbca/bcm6846/Kconfig
+++ b/arch/arm/mach-bcmbca/bcm6846/Kconfig
@@ -8,6 +8,7 @@
 config TARGET_BCM96846
 	bool "Broadcom 6846 Reference Board"
 	depends on ARCH_BCMBCA
+	imply OF_UPSTREAM
 	imply MTD_RAW_NAND
 	imply NAND_BRCMNAND
 	imply NAND_BRCMNAND_BCMBCA