kbuild: drop redundant "PHONY += FORCE"

"PHONY += FORCE" is already cared by scripts/Makefile.build,
which these files are included from.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Michal Marek <mmarek@suse.com>

arch/arm/boot/bootp/Makefile

@@ -25,4 +25,4 @@ $(obj)/kernel.o: arch/arm/boot/zImage FORCE
 
 $(obj)/initrd.o: $(INITRD) FORCE
 
-PHONY += $(INITRD) FORCE
+PHONY += $(INITRD)

arch/ia64/Makefile

@@ -96,7 +96,7 @@ define archhelp
 endef
 
 archprepare: make_nr_irqs_h
-PHONY += make_nr_irqs_h FORCE
+PHONY += make_nr_irqs_h
 
 make_nr_irqs_h:
 	$(Q)$(MAKE) $(build)=arch/ia64/kernel include/generated/nr-irqs.h

arch/unicore32/boot/Makefile

@@ -31,7 +31,7 @@ $(obj)/uImage: $(obj)/zImage FORCE
 	$(call if_changed,uimage)
 	@echo '  Image $@ is ready'
 
-PHONY += initrd FORCE
+PHONY += initrd
 initrd:
 	@test "$(INITRD)" != "" || \
 	(echo You must specify INITRD; exit -1)