[POWERPC] 4xx bootwrapper reworks

Make the fixup_memsize function common for all of 4xx as several chips share
the same SDRAM controller.  Also add functions to reset 40x chips and quiesce
the ethernet.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
diff --git a/arch/powerpc/boot/dcr.h b/arch/powerpc/boot/dcr.h
index 14b44aa..c95d1a9 100644
--- a/arch/powerpc/boot/dcr.h
+++ b/arch/powerpc/boot/dcr.h
@@ -121,4 +121,7 @@
 #define DCRN_CPC0_MIRQ1					0x0ed
 #define DCRN_CPC0_JTAGID				0x0ef
 
+#define DCRN_MAL0_CFG					0x180
+#define MAL_RESET 0x80000000
+
 #endif	/* _PPC_BOOT_DCR_H_ */