x86: Provide more configuration granularity

Planned future ports requires more granularity for some options

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index 71e94f7..eb5fa10 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -25,11 +25,11 @@
 
 LIB	= $(obj)lib$(ARCH).o
 
-SOBJS-y	+= bios.o
-SOBJS-y	+= bios_pci.o
-SOBJS-y	+= realmode_switch.o
+SOBJS-$(CONFIG_SYS_PC_BIOS)	+= bios.o
+SOBJS-$(CONFIG_SYS_PCI_BIOS)	+= bios_pci.o
+SOBJS-$(CONFIG_SYS_X86_REALMODE)	+= realmode_switch.o
 
-COBJS-y	+= bios_setup.o
+COBJS-$(CONFIG_SYS_PC_BIOS)	+= bios_setup.o
 COBJS-y	+= board.o
 COBJS-y	+= bootm.o
 COBJS-y	+= interrupts.o
@@ -37,11 +37,11 @@
 COBJS-$(CONFIG_SYS_GENERIC_TIMER) += pcat_timer.o
 COBJS-$(CONFIG_PCI) += pci.o
 COBJS-$(CONFIG_PCI) += pci_type1.o
-COBJS-y	+= realmode.o
-COBJS-y	+= timer.o
-COBJS-y	+= video_bios.o
-COBJS-y	+= video.o
-COBJS-y	+= zimage.o
+COBJS-$(CONFIG_SYS_X86_REALMODE)	+= realmode.o
+COBJS-$(CONFIG_SYS_X86_ISR_TIMER)	+= timer.o
+COBJS-$(CONFIG_VIDEO)	+= video_bios.o
+COBJS-$(CONFIG_VIDEO)	+= video.o
+COBJS-$(CONFIG_CMD_ZBOOT)	+= zimage.o
 
 SRCS	:= $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))