MIPS: Calculate VMLINUZ_LOAD_ADDRESS based on the length of vmlinux.bin

Fix VMLINUZ_LOAD_ADDRESS calculation to be based on the length of
vmlinux.bin, the actual uncompressed kernel binary.

Previously it was based on the length of KBUILD_IMAGE (the unstripped ELF
vmlinux), which is bigger than vmlinux.bin.  As a result, vmlinuz was
loaded into a memory address higher then actually needed - a problem for
small memory platforms.

Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
To: linux-mips@linux-mips.org
Cc: alex@digriz.org.uk
Cc: manuel.lauss@googlemail.com
Cc: sam@ravnborg.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1564/
Acked-by: Wu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/boot/compressed/Makefile

@@ -59,7 +59,7 @@ $(obj)/piggy.o: $(obj)/dummy.o $(obj)/vmlinux.bin.z FORCE
 hostprogs-y := calc_vmlinuz_load_addr
 
 VMLINUZ_LOAD_ADDRESS = $(shell $(obj)/calc_vmlinuz_load_addr \
-		$(objtree)/$(KBUILD_IMAGE) $(VMLINUX_LOAD_ADDRESS))
+		$(obj)/vmlinux.bin $(VMLINUX_LOAD_ADDRESS))
 
 vmlinuzobjs-y += $(obj)/piggy.o