soc: add stubs for brcmstb SoC's

Used on BCM7xxx Set-Top Box chips (e.g., BCM7445).

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

include/soc/brcmstb/common.h

@@ -0,0 +1,15 @@
+/*
+ * Copyright © 2014 NVIDIA Corporation
+ * Copyright © 2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __SOC_BRCMSTB_COMMON_H__
+#define __SOC_BRCMSTB_COMMON_H__
+
+bool soc_is_brcmstb(void);
+
+#endif /* __SOC_BRCMSTB_COMMON_H__ */