83xx/85xx/86xx: LBC register cleanup

Currently, 83xx, 86xx, and 85xx have a lot of duplicated code
dedicated to defining and manipulating the LBC registers.  Merge
this into a single spot.

To do this, we have to decide on a common name for the data structure
that holds the lbc registers - it will now be known as fsl_lbc_t, and we
adopt a common name for the immap layouts that include the lbc - this was
previously known as either im_lbc or lbus; use the former.

In addition, create accessors for the BR/OR regs that use in/out_be32
and use those instead of the mismash of access methods currently in play.

I have done a successful ppc build all and tested a board or two from
each processor family.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/board/freescale/mpc8360emds/mpc8360emds.c b/board/freescale/mpc8360emds/mpc8360emds.c
index 4f55732..59ada9c 100644
--- a/board/freescale/mpc8360emds/mpc8360emds.c
+++ b/board/freescale/mpc8360emds/mpc8360emds.c
@@ -280,7 +280,7 @@
 static int sdram_init(unsigned int base)
 {
 	volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
-	volatile fsl_lbus_t *lbc = &immap->lbus;
+	fsl_lbc_t *lbc = LBC_BASE_ADDR;
 	const int sdram_size = CONFIG_SYS_LBC_SDRAM_SIZE * 1024 * 1024;
 	int rem = base % sdram_size;
 	uint *sdram_addr;
@@ -293,8 +293,8 @@
 	/*
 	 * Setup SDRAM Base and Option Registers
 	 */
-	immap->lbus.bank[2].br = base | CONFIG_SYS_BR2;
-	immap->lbus.bank[2].or = CONFIG_SYS_OR2;
+	set_lbc_br(2, base | CONFIG_SYS_BR2);
+	set_lbc_or(2, CONFIG_SYS_OR2);
 	immap->sysconf.lblaw[2].bar = base;
 	immap->sysconf.lblaw[2].ar = CONFIG_SYS_LBLAWAR2;