ARM: arm1176: Define arch_cpu_init() at the SoC level

Commit 86c63265 "ARM: arm1176: enable instruction cache in
arch_cpu_init()" defined arch_cpu_init() in a file that is shared across
all arm1176 SoCs. tnetv107x already implemented this function, which
caused linking to break. Move the new conflicting arch_cpu_init() into
arm1176/bcm2835/init.c so that it doesn't conflict; grep indicates this
function is usually defined at the SoC-level, not the CPU-level, at least
for ARM.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Marek Vasut <marex@denx.de>

arch/arm/cpu/arm1176/bcm2835/Makefile

@@ -17,7 +17,7 @@ include $(TOPDIR)/config.mk
 LIB	= $(obj)lib$(SOC).o
 
 SOBJS	:= lowlevel_init.o
-COBJS	:= reset.o timer.o
+COBJS	:= init.o reset.o timer.o
 
 SRCS	:= $(SOBJS:.o=.c) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))

arch/arm/cpu/arm1176/bcm2835/init.c

+/*
+ * (C) Copyright 2012 Stephen Warren
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#include <common.h>
+
+int arch_cpu_init(void)
+{
+	icache_enable();
+
+	return 0;
+}

arch/arm/cpu/arm1176/cpu.c

@@ -65,10 +65,3 @@ static void cache_flush (void)
 	/* mem barrier to sync things */
 	asm ("mcr p15, 0, %0, c7, c10, 4": :"r" (0));
 }
-
-int arch_cpu_init(void)
-{
-	icache_enable();
-
-	return 0;
-}