powerpc: mpc83xx: Migrate DEFAULT_IMMR to Kconfig

As no platforms override this value, set it for all mpc83xx platforms.

Cc: Mario Six <mario.six@gdsys.cc>
Cc: Wolfgang Denk <wd@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>

arch/powerpc/cpu/mpc83xx/Kconfig

@@ -1,6 +1,10 @@
 menu "mpc83xx CPU"
 	depends on MPC83xx
 
+config DEFAULT_IMMR
+	hex
+	default 0xFF400000
+
 config E300
 	def_bool y
 

include/mpc83xx.h

@@ -21,10 +21,6 @@
 /*
  * IMMRBAR - Internal Memory Register Base Address
  */
-#ifndef CONFIG_DEFAULT_IMMR
-/* Default IMMR base address */
-#define CONFIG_DEFAULT_IMMR		0xFF400000
-#endif
 /* Register offset to immr */
 #define IMMRBAR				0x0000
 #define IMMRBAR_BASE_ADDR		0xFFF00000	/* Base addr. mask */