Stop using immap_t for guts offset on 85xx

In the future the offsets to various blocks may not be in same location.
Move to using CFG_MPC85xx_GUTS_ADDR as the base of the guts registers
instead of getting it via &immap->im_gur.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/board/mpc8560ads/mpc8560ads.c b/board/mpc8560ads/mpc8560ads.c
index eef524b..4a30bce 100644
--- a/board/mpc8560ads/mpc8560ads.c
+++ b/board/mpc8560ads/mpc8560ads.c
@@ -278,13 +278,12 @@
 {
 	long dram_size = 0;
 	extern long spd_sdram (void);
-	volatile immap_t *immap = (immap_t *)CFG_IMMR;
 
 	puts("Initializing\n");
 
 #if defined(CONFIG_DDR_DLL)
 	{
-	    volatile ccsr_gur_t *gur= &immap->im_gur;
+	    volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR);
 	    uint temp_ddrdll = 0;
 
 	    /*
@@ -327,7 +326,7 @@
 local_bus_init(void)
 {
 	volatile immap_t *immap = (immap_t *)CFG_IMMR;
-	volatile ccsr_gur_t *gur = &immap->im_gur;
+	volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR);
 	volatile ccsr_lbc_t *lbc = &immap->im_lbc;
 
 	uint clkdiv;