ppc4xx: HCU4/5. Cleanups

- Fix some coding style violations.
- Use in/out_u16/32 where appropriate.
- Use register names from ppc405.h.
- Fix trace useage for Lauterbach.
- Remove obsolete generation HCU2.
- Renamed fixed_hcu4_sdram to init_ppc405_sdram.

Signed-off-by: Niklaus Giger <niklaus.giger@netstal.com>
diff --git a/board/netstal/common/nm_bsp.c b/board/netstal/common/nm_bsp.c
index c4265bb..89c697c 100644
--- a/board/netstal/common/nm_bsp.c
+++ b/board/netstal/common/nm_bsp.c
@@ -29,8 +29,7 @@
 
 typedef struct {u8	id;	char *name;} generation_info;
 
-generation_info generations[7] = {
-	{HW_GENERATION_HCU2,	"HCU2"},
+generation_info generations[6] = {
 	{HW_GENERATION_HCU3,	"HCU3"},
 	{HW_GENERATION_HCU4,	"HCU4"},
 	{HW_GENERATION_HCU5,	"HCU5"},
@@ -134,3 +133,4 @@
 		saveenv();
 	}
 }
+