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/MAINTAINERS b/MAINTAINERS
index 4ccefb7..1ba36b6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -206,6 +206,17 @@
 F:	configs/rpi_*
 T:	git https://source.denx.de/u-boot/custodians/u-boot-arm.git
 
+ARM BROADCOM BCMBCA
+M:	Anand Gore <anand.gore@broadcom.com>
+M:	William Zhang <william.zhang@broadcom.com>
+M:	Kursad Oney <kursad.oney@broadcom.com>
+M:	Joel Peshkin <joel.peshkin@broadcom.com>
+S:	Maintained
+F:	arch/arm/mach-bcmbca/
+F:	board/broadcom/bcmbca/
+F:	configs/bcm947622_defconfig
+F:	include/configs/bcm947622.h
+
 ARM BROADCOM BCMSTB
 M:	Thomas Fitzsimmons <fitzsim@fitzsim.org>
 S:	Maintained