[MIPS] Add support for BCM47XX CPUs.

Note that the BCM4710 does not support the wait instruction, this
is not a mistake in the code.
    
It originally comes from the OpenWrt patches.
    
Cc: Michael Buesch <mb@bu3sch.de>
Cc: Felix Fietkau <nbd@openwrt.org>
Cc: Florian Schirmer <jolt@tuxbox.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/include/asm-mips/mach-bcm47xx/bcm47xx.h b/include/asm-mips/mach-bcm47xx/bcm47xx.h
new file mode 100644
index 0000000..a2fb5e8
--- /dev/null
+++ b/include/asm-mips/mach-bcm47xx/bcm47xx.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#ifndef __ASM_BCM47XX_H
+#define __ASM_BCM47XX_H
+
+/* SSB bus */
+extern struct ssb_bus ssb_bcm47xx;
+
+extern void bcm47xx_time_init(void);
+
+#endif /* __ASM_BCM47XX_H */