x86: Rename CONFIG_NO_X86_RESET_VECTOR to CONFIG_X86_RESET_VECTOR

Invert the polarity of this option to simplify the Makefile logic.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Gabe Black <gabeblack@chromium.org>
diff --git a/arch/x86/cpu/Makefile b/arch/x86/cpu/Makefile
index 57324b6..7b520f8 100644
--- a/arch/x86/cpu/Makefile
+++ b/arch/x86/cpu/Makefile
@@ -29,12 +29,12 @@
 LIB	= $(obj)lib$(CPU).o
 
 START-y	= start.o
-RESET_OBJS-$(CONFIG_X86_NO_RESET_VECTOR) += resetvec.o start16.o
+START-$(CONFIG_X86_RESET_VECTOR) += resetvec.o start16.o
 COBJS	= interrupts.o cpu.o timer.o
 
 SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
-START	:= $(addprefix $(obj),$(START-y) $(RESET_OBJS-))
+START	:= $(addprefix $(obj),$(START-y))
 
 all:	$(obj).depend $(START) $(LIB)