[POWERPC] Create a zImage for legacy iSeries

This zImage is really just the stripped vmlinux, but it means that there
is one less special case for iSeries and also that the zImages will be
built for a combined kernel build that happens to include iSeries.

This zImage boots fine on legacy iSeries.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/Makefile

@@ -142,7 +142,6 @@ drivers-$(CONFIG_OPROFILE)	+= arch/powerpc/oprofile/
 
 # Default to zImage, override when needed
 defaultimage-y			:= zImage
-defaultimage-$(CONFIG_PPC_ISERIES) := vmlinux
 defaultimage-$(CONFIG_DEFAULT_UIMAGE) := uImage
 KBUILD_IMAGE := $(defaultimage-y)
 all: $(KBUILD_IMAGE)

arch/powerpc/boot/Makefile

@@ -136,6 +136,7 @@ image-$(CONFIG_PPC_EFIKA)		+= zImage.chrp
 image-$(CONFIG_PPC_PMAC)		+= zImage.pmac
 image-$(CONFIG_PPC_HOLLY)		+= zImage.holly-elf
 image-$(CONFIG_PPC_PRPMC2800)		+= zImage.prpmc2800
+image-$(CONFIG_PPC_ISERIES)		+= zImage.iseries
 image-$(CONFIG_DEFAULT_UIMAGE)		+= uImage
 
 ifneq ($(CONFIG_DEVICE_TREE),"")
@@ -185,6 +186,9 @@ $(obj)/zImage.initrd.%: vmlinux $(wrapperbits)
 $(obj)/zImage.%: vmlinux $(wrapperbits)
 	$(call if_changed,wrap,$*)
 
+$(obj)/zImage.iseries: vmlinux
+	$(STRIP) -s -R .comment $< -o $@
+
 $(obj)/zImage.ps3: vmlinux
 	$(STRIP) -s -R .comment $< -o $@