arm: bcmbca: introduce the bcmbca architecture and 47622 SOC

This is the initial support for Broadcom's ARM-based 47622 SOC.

In this change, our first SOC is an armv7 platform called 47622. The
initial support includes a bare-bone implementation and dts with ARM
PL011 uart.

The SOC-specific code resides in arch/arm/mach-bcmbca/<soc> and board
related code is in board/broadcom/bcmba.

The u-boot image can be loaded from flash or network to the entry
point address in the memory and boot from there.

Signed-off-by: William Zhang <william.zhang@broadcom.com>
Signed-off-by: Kursad Oney <kursad.oney@broadcom.com>
Signed-off-by: Anand Gore <anand.gore@broadcom.com>
Reviewed-by: Philippe Reynes <philippe.reynes@softathome.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 9898c7d..2f8c793 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -718,6 +718,11 @@
 	  This enables support for Broadcom ARM-based set-top box
 	  chipsets, including the 7445 family of chips.
 
+config ARCH_BCMBCA
+	bool "Broadcom broadband chip family"
+	select DM
+	select OF_CONTROL
+
 config TARGET_VEXPRESS_CA9X4
 	bool "Support vexpress_ca9x4"
 	select CPU_V7A
@@ -2187,6 +2192,8 @@
 
 source "arch/arm/mach-bcm283x/Kconfig"
 
+source "arch/arm/mach-bcmbca/Kconfig"
+
 source "arch/arm/mach-bcmstb/Kconfig"
 
 source "arch/arm/mach-davinci/Kconfig"