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/mpc8349itx/mpc8349itx.c b/board/freescale/mpc8349itx/mpc8349itx.c
index 7da39f1..5647579 100644
--- a/board/freescale/mpc8349itx/mpc8349itx.c
+++ b/board/freescale/mpc8349itx/mpc8349itx.c
@@ -221,15 +221,14 @@
 		0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01
 	};
 	volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
-	volatile fsl_lbus_t *lbus = &immap->lbus;
 
-	lbus->bank[3].br = CONFIG_SYS_BR3_PRELIM;
-	lbus->bank[3].or = CONFIG_SYS_OR3_PRELIM;
+	set_lbc_br(3, CONFIG_SYS_BR3_PRELIM);
+	set_lbc_or(3, CONFIG_SYS_OR3_PRELIM);
 
 	/* Program the MAMR. RFEN=0, OP=00, UWPL=1, AM=000, DS=01, G0CL=000,
 	   GPL4=0, RLF=0001, WLF=0001, TLF=0001, MAD=000000
 	 */
-	lbus->mamr = 0x08404440;
+	immap->im_lbc.mamr = 0x08404440;
 
 	upmconfig(0, UPMATable, sizeof(UPMATable) / sizeof(UPMATable[0]));