arm: bcmcygnus: Add bcmcygnus u-architecture

Base support for the Broadcom Cygnus SoC.
Based on iproc-common and the SoC specific reset function.

Signed-off-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Steve Rae <srae@broadcom.com>

arch/arm/cpu/armv7/bcmcygnus/Makefile

+#
+# Copyright 2014 Broadcom Corporation.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	+= reset.o

arch/arm/cpu/armv7/bcmcygnus/reset.c

+/*
+ * Copyright 2014 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+
+#define CRMU_MAIL_BOX1		0x03024028
+#define CRMU_SOFT_RESET_CMD	0xFFFFFFFF
+
+void reset_cpu(ulong ignored)
+{
+	/* Send soft reset command via Mailbox. */
+	writel(CRMU_SOFT_RESET_CMD, CRMU_MAIL_BOX1);
+
+	while (1)
+		;	/* loop forever till reset */
+}