[PATCH] fix make O= for ppc64/boot

make ARCH=ppc64 -j12 O=/dev/shm/R all fails, the linker script is not in
the output directory.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ppc64/boot/Makefile

@@ -29,7 +29,7 @@ BOOTCFLAGS	:= $(HOSTCFLAGS) $(LINUXINCLUDE) -fno-builtin
 BOOTAS		:= $(CROSS32_COMPILE)as
 BOOTAFLAGS	:= -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional
 BOOTLD		:= $(CROSS32_COMPILE)ld
-BOOTLFLAGS	:= -Ttext 0x00400000 -e _start -T $(obj)/zImage.lds
+BOOTLFLAGS	:= -Ttext 0x00400000 -e _start -T $(srctree)/$(src)/zImage.lds
 BOOTOBJCOPY	:= $(CROSS32_COMPILE)objcopy
 OBJCOPYFLAGS    := contents,alloc,load,readonly,data