arm: bcmbca: add bcm63178 SoC support

BCM63178 is an ARM A7 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 ARM PL011 uart.

This SoC is supported in the linux-next git repository so the dts and
dtsi files are copied from linux with minor fix-up that needs to be
upstreamed to linux as well.

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/Kconfig b/arch/arm/mach-bcmbca/Kconfig
index 2d49380..99e26e4 100644
--- a/arch/arm/mach-bcmbca/Kconfig
+++ b/arch/arm/mach-bcmbca/Kconfig
@@ -12,6 +12,14 @@
 	select DM_SERIAL
 	select PL01X_SERIAL
 
-endif
+config BCM63178
+	bool "Support for Broadcom 63178 Family"
+	select SYS_ARCH_TIMER
+	select CPU_V7A
+	select DM_SERIAL
+	select PL01X_SERIAL
 
 source "arch/arm/mach-bcmbca/bcm47622/Kconfig"
+source "arch/arm/mach-bcmbca/bcm63178/Kconfig"
+
+endif
diff --git a/arch/arm/mach-bcmbca/Makefile b/arch/arm/mach-bcmbca/Makefile
index 072d4ea..fdcade6 100644
--- a/arch/arm/mach-bcmbca/Makefile
+++ b/arch/arm/mach-bcmbca/Makefile
@@ -4,3 +4,4 @@
 #
 
 obj-$(CONFIG_BCM47622) += bcm47622/
+obj-$(CONFIG_BCM63178) += bcm63178/
diff --git a/arch/arm/mach-bcmbca/bcm63178/Kconfig b/arch/arm/mach-bcmbca/bcm63178/Kconfig
new file mode 100644
index 0000000..73ac462
--- /dev/null
+++ b/arch/arm/mach-bcmbca/bcm63178/Kconfig
@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2022 Broadcom Ltd
+#
+
+if BCM63178
+
+config TARGET_BCM963178
+	bool "Broadcom 63178 Reference Board"
+	depends on ARCH_BCMBCA
+
+config SYS_SOC
+	default "bcm63178"
+
+source "board/broadcom/bcmbca/Kconfig"
+
+endif
diff --git a/arch/arm/mach-bcmbca/bcm63178/Makefile b/arch/arm/mach-bcmbca/bcm63178/Makefile
new file mode 100644
index 0000000..beb979a
--- /dev/null
+++ b/arch/arm/mach-bcmbca/bcm63178/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2022 Broadcom Ltd
+#
+obj- += dummy.o