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/freescale/mpc8544ds/mpc8544ds.c b/board/freescale/mpc8544ds/mpc8544ds.c
index 6f9864a..e13be63 100644
--- a/board/freescale/mpc8544ds/mpc8544ds.c
+++ b/board/freescale/mpc8544ds/mpc8544ds.c
@@ -50,7 +50,7 @@
 int checkboard (void)
 {
 	volatile immap_t *immap = (immap_t *) CFG_CCSRBAR;
-	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;
 	volatile ccsr_local_ecm_t *ecm = &immap->im_local_ecm;
 
@@ -146,8 +146,7 @@
 void
 pci_init_board(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);
 	uint devdisr = gur->devdisr;
 	uint io_sel = (gur->pordevsr & MPC85xx_PORDEVSR_IO_SEL) >> 19;
 	uint host_agent = (gur->porbmsr & MPC85xx_PORBMSR_HA) >> 16;