ARM: bcm283x: don't always define CONFIG_BCM2835

Currently, CONFIG_BCM2835 is defined for all BCM283x builds and _BCM2836
is defined when building for that SoC. That means there isn't a single
define that means "exactly BCM2835". This will complicate future patches
where BCM2835-vs-anything-else needs to be determined simply.

Modify the code to define one or the other of CONFIG_BCM2835/BCM2836 so
future patches are simpler.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

include/configs/rpi-common.h

@@ -11,7 +11,6 @@
 #include <asm/arch/timer.h>
 
 /* Architecture, CPU, etc.*/
-#define CONFIG_BCM2835
 #define CONFIG_ARCH_CPU_INIT
 
 #define CONFIG_SYS_TIMER_RATE		1000000
@@ -26,7 +25,7 @@
  * chose to use someone else's previously registered machine ID (3139, MX51_GGC)
  * rather than obtaining a valid ID:-/
  */
-#ifndef CONFIG_BCM2836
+#ifdef CONFIG_BCM2835
 #define CONFIG_MACH_TYPE		MACH_TYPE_BCM2708
 #endif
 
@@ -80,7 +79,7 @@
 #define CONFIG_CMD_USB
 #ifdef CONFIG_CMD_USB
 #define CONFIG_USB_DWC2
-#ifdef CONFIG_BCM2836
+#ifndef CONFIG_BCM2835
 #define CONFIG_USB_DWC2_REG_ADDR 0x3f980000
 #else
 #define CONFIG_USB_DWC2_REG_ADDR 0x20980000

include/configs/rpi.h

@@ -7,6 +7,7 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
+#define CONFIG_BCM2835
 #define CONFIG_SYS_CACHELINE_SIZE		32
 
 #include "rpi-common.h"