Upstream doesn't optimize the kernel and bootwrappers for ppc44x because
they still want to support gcc 3.3 -- well, we don't.

--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -130,7 +130,8 @@ ifeq ($(CONFIG_FUNCTION_TRACER),y)
 KBUILD_CFLAGS		+= -mno-sched-epilog
 endif
 
-cpu-as-$(CONFIG_4xx)		+= -Wa,-m405
+cpu-as-$(CONFIG_40x)		+= -Wa,-m405
+cpu-as-$(CONFIG_44x)		+= -Wa,-m440
 cpu-as-$(CONFIG_ALTIVEC)	+= -Wa,-maltivec
 cpu-as-$(CONFIG_E500)		+= -Wa,-me500
 cpu-as-$(CONFIG_E200)		+= -Wa,-me200
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -38,10 +38,10 @@ BOOTCFLAGS	+= -I$(obj) -I$(srctree)/$(ob
 DTC_FLAGS	?= -p 1024
 
 $(obj)/4xx.o: BOOTCFLAGS += -mcpu=405
-$(obj)/ebony.o: BOOTCFLAGS += -mcpu=405
+$(obj)/ebony.o: BOOTCFLAGS += -mcpu=440
 $(obj)/cuboot-hotfoot.o: BOOTCFLAGS += -mcpu=405
-$(obj)/cuboot-taishan.o: BOOTCFLAGS += -mcpu=405
-$(obj)/cuboot-katmai.o: BOOTCFLAGS += -mcpu=405
+$(obj)/cuboot-taishan.o: BOOTCFLAGS += -mcpu=440
+$(obj)/cuboot-katmai.o: BOOTCFLAGS += -mcpu=440
 $(obj)/cuboot-acadia.o: BOOTCFLAGS += -mcpu=405
 $(obj)/treeboot-walnut.o: BOOTCFLAGS += -mcpu=405
 $(obj)/treeboot-iss4xx.o: BOOTCFLAGS += -mcpu=405