[ARM] Fix two makefile problems

- bootp.lds is a source file not a target
- vmlinux.lds doesn't need to depend on the top level Makefile

arch/arm/boot/bootp/Makefile

@@ -7,10 +7,10 @@ LDFLAGS_bootp	:=-p --no-undefined -X \
 		 --defsym params_phys=$(PARAMS_PHYS) -T
 AFLAGS_initrd.o :=-DINITRD=\"$(INITRD)\"
 
-targets	:= bootp bootp.lds init.o kernel.o initrd.o
+targets	:= bootp init.o kernel.o initrd.o
 
 # Note that bootp.lds picks up kernel.o and initrd.o
-$(obj)/bootp:	$(addprefix $(obj)/,bootp.lds init.o kernel.o initrd.o) FORCE
+$(obj)/bootp:	$(src)/bootp.lds $(addprefix $(obj)/,init.o kernel.o initrd.o) FORCE
 	$(call if_changed,ld)
 	@:
 

arch/arm/boot/compressed/Makefile

@@ -101,7 +101,7 @@ $(obj)/piggy.o:  $(obj)/piggy.gz FORCE
 CFLAGS_font.o := -Dstatic=
 $(obj)/font.o: $(FONTC)
 
-$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in Makefile arch/arm/boot/Makefile .config
+$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in arch/arm/boot/Makefile .config
 	@sed "$(SEDFLAGS)" < $< > $@
 
 $(obj)/misc.o: $(obj)/misc.c include/asm/arch/uncompress.h lib/inflate.c