ARM: bcm283x: Move BCM283x_BASE to a global variable

We move the per SOC define BCM283x_BASE to a global variable.
This is a first step to provide a single binary for several bcm283x
SoCs.

Signed-off-by: Matthias Brugger <mbrugger@suse.com>
diff --git a/arch/arm/mach-bcm283x/init.c b/arch/arm/mach-bcm283x/init.c
index 9741441..d36017e 100644
--- a/arch/arm/mach-bcm283x/init.c
+++ b/arch/arm/mach-bcm283x/init.c
@@ -8,6 +8,8 @@
 
 #include <common.h>
 
+unsigned long rpi_bcm283x_base;
+
 int arch_cpu_init(void)
 {
 	icache_enable();
@@ -15,6 +17,12 @@
 	return 0;
 }
 
+int mach_cpu_init(void)
+{
+	rpi_bcm283x_base = CONFIG_BCM283x_BASE;
+
+	return 0;
+}
 #ifdef CONFIG_ARMV7_LPAE
 void enable_caches(void)
 {