arm: bcmbca: add bcm63148 SoC support

BCM63148 is an Broadcom B15 based DSL Broadband SoC. It is part of the
BCA (Broadband Carrier Access origin) chipset family so it's added under
ARCH_BCMBCA platform. This initial support includes a bare-bone
implementation and dts with CPU subsystem, memory and Broadcom uart.

This SoC is supported in the linux-next git repository so the dts and
dtsi files are copied from linux.

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>
diff --git a/arch/arm/mach-bcmbca/Makefile b/arch/arm/mach-bcmbca/Makefile
index 5eb483c..8a22f9a 100644
--- a/arch/arm/mach-bcmbca/Makefile
+++ b/arch/arm/mach-bcmbca/Makefile
@@ -4,6 +4,7 @@
 #
 
 obj-$(CONFIG_BCM47622) += bcm47622/
+obj-$(CONFIG_BCM63148) += bcm63148/
 obj-$(CONFIG_BCM63178) += bcm63178/
 obj-$(CONFIG_BCM6756) += bcm6756/
 obj-$(CONFIG_BCM6846) += bcm6846/