arch: bcm281xx: Initial commit of bcm281xx architecture code

Add bcm281xx architecture support code including a clock framework and
chip reset.  Define register block base addresses for the bcm281xx
architecture and create an empty gpio header file required when
CONFIG_CMD_GPIO is set.

Signed-off-by: Darwin Rambo <drambo@broadcom.com>
Reviewed-by: Steve Rae <srae@broadcom.com>
Reviewed-by: Tim Kryger <tkryger@linaro.org>
diff --git a/arch/arm/cpu/armv7/bcm281xx/Makefile b/arch/arm/cpu/armv7/bcm281xx/Makefile
new file mode 100644
index 0000000..98f5aa5
--- /dev/null
+++ b/arch/arm/cpu/armv7/bcm281xx/Makefile
@@ -0,0 +1,11 @@
+#
+# Copyright 2013 Broadcom Corporation.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	+= reset.o
+obj-y	+= clk-core.o
+obj-y	+= clk-bcm281xx.o
+obj-y	+= clk-sdio.o
+obj-y	+= clk-bsc.o