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/sbc8349/sbc8349.c b/board/sbc8349/sbc8349.c
index 34861d4..50fae7c 100644
--- a/board/sbc8349/sbc8349.c
+++ b/board/sbc8349/sbc8349.c
@@ -160,7 +160,7 @@
 void sdram_init(void)
 {
 	volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
-	volatile fsl_lbus_t *lbc = &immap->lbus;
+	volatile fsl_lbc_t *lbc = &immap->im_lbc;
 	uint *sdram_addr = (uint *)CONFIG_SYS_LBC_SDRAM_BASE;
 
 	puts("\n   SDRAM on Local Bus: ");